The Longines 23M watch movement is a collector's favorite vintage Longines watch from the 1940s/50s. This auction is for one (1) Longines 23M caliber T brace mainspring  - a vintage New Old Stock NOS watch part made in Switzerland. Comes in the original parts envelope shown, which has been opened for inspection. Just added are many other Longines winding stem Longines mainspring balance staff and other vintage Longines parts for early calibers.

SEE SQUINKY'S COMPLETE LONGINES SECTION: We have parts for Longines 19.4 23Z 10L 12L 10.68 12.68 22L 19A and many others, as well as used movements in Longines caliber 431 23ZS 19A 19AS 510 6652 and many others. Message us if you need an old Longines wrist watch or pocket watch part or used movement that is not listed. Bid with confidence with a seller with more than 18,000 positive feedbacks and history on EBAY since 1998. An NAWCC watch collector's association member since 1997.