Genuine Longines Watch Mainsprings

Using Blue Steel Mainsprings

When alloy spring is not available watch repairpersons will use vintage blue steel mainsprings to get the watch ticking again.

Be sure to inspect the vintage blue steel spring for any kinks or signs of rust. A mainspring winder will be needed when using vintage mainsprings. To avoid breakage it is advisable follow this advice from the 1950 Swartchild Co. catalog. "Wind spring into barrel with mainspring winder, then release and wind again about 3 more times, as this allows spring to assume proper shape in the barrel, and also prevents breakage."

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Otto Frei, Watch Parts Since 1930
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Mailing Address: PO BOX 796, Oakland Ca. 94604
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Genuine Longines Alloy Mainspring Caliber 14.17 $24.00 MS-LONG-14.17	Genuine Longines Alloy Mainspring Caliber 10L $24.00 MS-LONG-10L Width 1.60 mm, Strength 0.09 mm, Length 13 1/2 inches	Genuine Longines Alloy Mainspring Caliber 118 $24.00 MS-LONG-118
Genuine Longines Alloy Mainspring Caliber 119 $24.00 MS-LONG-119	Genuine Longines Alloy Mainspring Caliber 12L $24.00 MS-LONG-12L	Genuine Longines Alloy Mainspring Caliber 12LNS $24.00 MS-LONG-10LNS
Genuine Longines Alloy Mainspring Caliber 13.97 $24.00 MS-LONG-13.97	Genuine Longines Alloy Mainspring Caliber 13/15 $24.00 MS-LONG-13/15	Genuine Longines Alloy Mainspring Caliber 13/50 $24.00 MS-LONG-13/50
Genuine Longines Alloy Mainspring Caliber 13L $24.00 MS-LONG-13L	Genuine Longines Alloy Mainspring Caliber 14.16 $24.00 MS-LONG-14.16	Genuine Longines Alloy Mainspring Caliber 18L $24.00 MS-LONG-18L
Genuine Longines Alloy Mainspring Caliber 19A $24.00 MS-LONG-19A	Genuine Longines Alloy Mainspring Caliber 22A $24.00 MS-LONG-22A	Genuine Longines Alloy Mainspring Caliber 23M $24.00 MS-LONG-23M
Genuine Longines Alloy Mainspring Caliber 27M $24.00 MS-LONG-27M	Genuine Longines Alloy Mainspring Caliber 294 $24.00 MS-LONG-294	Genuine Longines Alloy Mainspring Caliber 30CH $24.00 MS-LONG-30CH
Genuine Longines Alloy Mainspring Caliber 312 $35.00 MS-LONG-312	Genuine Longines Alloy Mainspring Caliber 320 $35.00 MS-LONG-320	Genuine Longines Alloy Mainspring Caliber 370 $24.00 MS-LONG-370
Genuine Longines Alloy Mainspring Caliber 490 $26.00 MS-LONG-490	Genuine Longines Alloy Mainspring Caliber 4LL $24.00 MS-LONG-4LL	Genuine Longines Alloy Mainspring Caliber 5LN $24.00 MS-LONG-5LN
Genuine Longines Alloy Mainspring Caliber 8M $24.00 MS-LONG-8M	Genuine Longines Blue Steel Mainspring Caliber 10/26 $8.00 MS-LONG-STEEL-10/26	Genuine Longines Blue Steel Mainspring Caliber 10/26 $8.00 MS-LONG-STEEL-10/26
Genuine Longines Blue Steel Mainspring Caliber 10/32 $8.00 MS-LONG-STEEL-10/32	Genuine Longines Blue Steel Mainspring Caliber 10/85 $8.00 MS-LONG-STEEL-10/85	Genuine Longines Blue Steel Mainspring Caliber 10/85M $8.00 MS-LONG-STEEL-10/85M
Genuine Longines Blue Steel Mainspring Caliber 10/86 $8.00 MS-LONG-STEEL-10/86	Genuine Longines Blue Steel Mainspring Caliber 10/86N $8.00 MS-LONG-STEEL-10/86N	Genuine Longines Blue Steel Mainspring Caliber 10L $8.00 MS-LONG-STEEL-10L
Genuine Longines Blue Steel Mainspring Caliber 11/84N $8.00 MS-LONG-STEEL-11/84N	Genuine Longines Blue Steel Mainspring Caliber 11/87 $8.00 MS-LONG-STEEL-11/87	Genuine Longines Blue Steel Mainspring Caliber 11/87M $8.00 MS-LONG-STEEL-11/87M
Genuine Longines Blue Steel Mainspring Caliber 11/88 $8.00 MS-LONG-STEEL-11/88	Genuine Longines Blue Steel Mainspring Caliber 12/91 $8.00 MS-LONG-STEEL-12/91	Genuine Longines Blue Steel Mainspring Caliber 12/92 $8.00 MS-LONG-STEEL-12/92
Genuine Longines Blue Steel Mainspring Caliber 12/99 $8.00 MS-LONG-STEEL-12/99	Genuine Longines Blue Steel Mainspring Caliber 12L $8.00 MS-LONG-STEEL-12L	Genuine Longines Blue Steel Mainspring Caliber 13.56 $8.00 MS-LONG-STEEL-13.56
Genuine Longines Blue Steel Mainspring Caliber 13.67 $8.00 MS-LONG-STEEL-13.67	Genuine Longines Blue Steel Mainspring Caliber 13.81 $8.00 MS-LONG-STEEL-13.81	Genuine Longines Blue Steel Mainspring Caliber 13.97 $8.00 MS-LONG-STEEL-13.97
Genuine Longines Blue Steel Mainspring Caliber 13/34 $8.00 MS-LONG-STEEL-13/34	Genuine Longines Blue Steel Mainspring Caliber 17.25 $8.00 MS-LONG-STEEL-17.25 Width 2.0 mm, strength 0.18 and length 460 mm with T end. Also for 17.27, 17.80, 17.90, 18.18, 18.25, 18.80, 18.90	Genuine Longines Blue Steel Mainspring Caliber 17.95M "T" End $8.00 MS-LONG-STEEL-17.95M
Genuine Longines Blue Steel Mainspring Caliber 18.25 $8.00 MS-LONG-STEEL-18.25	Genuine Longines Blue Steel Mainspring Caliber 18.69m $8.00 MS-LONG-STEEL-18.69M	Genuine Longines Blue Steel Mainspring Caliber 18.72 $8.00 MS-LONG-STEEL-18.72
Genuine Longines Blue Steel Mainspring Caliber 17.89M & 18.89M $18.00 MS-LONG-STEEL-18.89M For Longines 17.89M and 18.89M	Genuine Longines Blue Steel Mainspring Caliber 19.25 $8.00 MS-LONG-STEEL-19.25	Genuine Longines Blue Steel Mainspring Caliber 19.41 $8.00 MS-LONG-STEEL-19.41
Genuine Longines Blue Steel Mainspring Caliber 19.65 $8.00 MS-LONG-STEEL-19.65	Genuine Longines Blue Steel Mainspring Caliber 19.71 $8.00 MS-LONG-STEEL-19.71	Genuine Longines Blue Steel Mainspring Caliber 19.71A $8.00 MS-LONG-STEEL-19.71A
Genuine Longines Blue Steel Mainspring Caliber 19.71N $8.00 MS-LONG-STEEL-19.71N	Genuine Longines Blue Steel Mainspring Caliber 19.73N $8.00 MS-LONG-STEEL-19.73N	Genuine Longines Blue Steel Mainspring Caliber 19.74N $8.00 MS-LONG-STEEL-19.74N
Genuine Longines Blue Steel Mainspring Caliber 19.95/1 $8.00 MS-LONG-STEEL-19.95/1	Genuine Longines Blue Steel Mainspring Caliber 21.26 $8.00 MS-LONG-STEEL-21.26	Genuine Longines Blue Steel Mainspring Caliber 21.29 $8.00 MS-LONG-STEEL-21.29
Genuine Longines Blue Steel Mainspring Caliber 21.54 $8.00 MS-LONG-STEEL-21.54	Genuine Longines Blue Steel Mainspring Caliber 23M $8.00 MS-LONG-STEEL-23M	Genuine Longines Blue Steel Mainspring Caliber 24.99 Hole End $8.00 MS-LONG-STEEL-HOLE-24.99
Genuine Longines Blue Steel Mainspring Caliber 24.99 Tee End $8.00 MS-LONG-STEEL-TEE-24.99	Genuine Longines Blue Steel Mainspring Caliber 27M $8.00 MS-LONG-STEEL-27M	Genuine Longines Blue Steel Mainspring Caliber 37.9 $8.00 MS-LONG-STEEL-37.9
Genuine Longines Blue Steel Mainspring Caliber 37.93 $8.00 MS-LONG-STEEL-37.93	Genuine Longines Blue Steel Mainspring Caliber 3L $8.00 MS-LONG-STEEL-3L	Genuine Longines Blue Steel Mainspring Caliber 4/21 $8.00 MS-LONG-STEEL-4/21
Genuine Longines Blue Steel Mainspring Caliber 4L $8.00 MS-LONG-STEEL-4L	Genuine Longines Blue Steel Mainspring Caliber 4LL $8.00 MS-LONG-STEEL-4LL	Genuine Longines Blue Steel Mainspring Caliber 5L $8.00 MS-LONG-STEEL-5L
Genuine Longines Blue Steel Mainspring Caliber 7/45 $8.00 MS-LONG-STEEL-7/45	Genuine Longines Blue Steel Mainspring Caliber 8/28 $8.00 MS-LONG-STEEL-8/28	Genuine Longines Blue Steel Mainspring Caliber 8/28 $8.00 MS-LONG-STEEL-8/28
Genuine Longines Blue Steel Mainspring Caliber 8/37 $8.00 MS-LONG-STEEL-8/37	Genuine Longines Blue Steel Mainspring Caliber 8/47 $8.00 MS-LONG-STEEL-8/47	Genuine Longines Blue Steel Mainspring Caliber 8L $8.00 MS-LONG-STEEL-8L
Genuine Longines Blue Steel Mainspring Caliber 8LN $8.00 MS-LONG-STEEL-8LN	Genuine Longines Blue Steel Mainspring Caliber 8M $8.00 MS-LONG-STEEL-8M	Genuine Longines Blue Steel Mainspring Caliber 9/32 $8.00 MS-LONG-STEEL-9/32
Genuine Longines Blue Steel Mainspring Caliber 9/35 $8.00 MS-LONG-STEEL-9/35	Genuine Longines Blue Steel Mainspring Caliber 9/35 $8.00 MS-LONG-STEEL-9/35	Genuine Longines Blue Steel Mainspring Caliber 9/35 $8.00 MS-LONG-STEEL-9/35
Genuine Longines Blue Steel Mainspring Caliber 9/47N $8.00 MS-LONG-STEEL-9/47N	Genuine Longines Blue Steel Mainspring Caliber 9/47N $8.00 MS-LONG-STEEL-9/47N	Genuine Longines Blue Steel Mainspring Caliber 9L $8.00 MS-LONG-STEEL-9L
Genuine Longines Blue Steel Mainspring Caliber 9LT $8.00 MS-LONG-STEEL-9LT	Genuine Longines Blue Steel Mainspring Caliber 17.95M "Hole" End $8.00 MS-LONG-STEEL-17.95M-HE