Made by Incabloc (Swiss) and their Lyre Spring. Is visible above the Balance.It is interchangeable with any post-1955 Model 4L Ships Bell or 4M (Time & Strike) model. Shown (see photos 2 & 3) on page 115 of Chelsea Clocks: A Technical Manual as Part #53504. Because of the unique spring that protects the Balance Staff, it does not need to be paper shimmed for transit as I have done in the past. Please Note : Escapement repairs are best left to professionally trained and experienced technicians as novices frequently tend to cause more (and expensive) damage to delicate parts.
If you do not have a copy of the Technical Manual and do not know what clock model you have, you can always send a photo and the serial number for assistance. It's safer to ask than make an expensive mistake.The item "Chelsea Clock Co. Complete #24 Platform Escapement for a Model 4L SHIPS BELL NOS" is in sale since Monday, March 18, 2019. This item is in the category "Antiques\Maritime\Maritime Clocks". The seller is "aka315" and is located in Palm Beach Gardens, Florida. This item can be shipped to United States.