Chelsea Clock Co. The Most Versatile Balance Staff for Numerous Escapements

Description

Chelsea Clock Co. The Most Common Factory Balance Staff #51727 for Numerous Platform Escapements
This is the most versatile factory Balance Staff manufactured for a variety of Escapements used on Chelsea Movements.
E
(Post-1930 Marine with recessed Platform Escapement)
12E
(USN Type A &B Deck Clocks)
13E
(U.S. Army Message Center Mark 1)
14E
(USN Zig-Zag)
16E
(Marine)
17E
and
17K
(Rear Wind Mark I Deck Clocks)
18K
(Marine Front Wind)
F
(Pilot House
with recessed Platform Escapement)
K
(Auto & Marine with recessed Platform Escapement)
L
(Post-1929 Ships Bell with recessed Platform Escapement)
2L
(Post-1929 Automatic Ships Bell with recessed Platform Escapement)
4L
(Post-1949 Ships Bell)
M
(Post-1929 House Strike
with recessed Platform Escapement)
4M
(Post-1951 House Strike)
Shown or listed on pages 32, 83, 101, 122, and 171 of
Chelsea Clocks: A Technical Manual Part I
and
t
he General History of Chelsea Escapement development is listed on pages 151 & 152.
Recessed Platform Escapements
:  In the latter part of 1929, Chelsea converted all of their movements from Direct Train Escapements to Platform Escapements. Instead of direct surface mounting on the movement plate, almost all of the Platforms have milled shoulders allowing the Platform to drop into a recessed area on the movement plate for flush mounting.
If you don't know or are just uncertain about your clock's movement, please feel free to send a question before risking a purchase. I welcome questions along with escapement photos when appropriate.  If you don't have either
Chelsea Clocks: A
Technical Manual
or
Chelsea Clock Company, The First 100 Years
, it would be wise to send the serial number on the movement and a photo if you are attempting to identify it.  Likewise, Escapement Repairs are best left to professionally trained and experienced technicians as novices frequently tend to cause more (and expensive) damage to delicate parts. The phrase "if you break it, you bought it" applies here.
I have a l
imited supply and t
hey are no longer available from the factory.
There are no returns, reserve, warranties or international shipping.  USPS First Class Mail shipping will be .73 by padded envelope to anywhere in the lower 48 states of the USA.  Add for USPS Priority Mail to anywhere in the USA.