C001-C13000..............................1940-1941*
C13001-C37900..........................1941-1942
C37901-C62800..........................1942-1943
C62801-C87700..........................1943-1944
C87701-C112400 .......................1944-1945
C112401-C137500......................1945-1946
C137501-C175000......................1946
C175001-C199800......................1947
C199801-C254500......................1948
C254501-C281400......................1949
C281401-C310200......................1950
C310201-C352800......................1951
C352801-C385800......................1952
C385801-C408300......................1953
C408301-C415500......................1954**

C415501-C423600......................1955
C423601-C441700......................1956
C441701-C448400......................1957
C448401-C455000......................1958
C455001-C461700......................1959
C461701-C468400......................1960
C468401-C475000......................1961
C475001-C481700......................1962
C481701-C488400......................1963
C488401-C495000......................1964
C495001-C501700......................1965
C501701-C508400......................1966
C508401-C515100......................1967
C515101-C521800......................1968

C521801-C525300......................1969***

All with "4C Prefix".....................1970****


* According to a Hamilton sales catalog the new 992B was planned for public introduction October 15th 1940.

** Last Officially Recorded Numbers, compiled from Hamilton Factory Records on the John F. Gelson Listing.

*** Taking into consideration the highest known number C525258 which is also rounded to next hundred.

Colonel George E. Townsend stated that the last Hamilton Railroad Watch was a 992B bearing C525169 movement number. That one was reported to have been cased and presented to Hamilton Watch Company President Arthur Sinkler in December of 1969 marking the end of regular production. Interestingly, we have documented a higher 992B production number C525258 thanks to Samie Smith, scroll down below this posting to see an image displayed. But as you'll read below neither C525169 or C525258 was really the end, there were post-production 992B movements assembled.

**** During 1970 the last American Railroad Pocket Watch movements were assembled. Although guesstimates run as high as a few hunderd we may never be certain how exactly many or how few of the "4C Prefix" Serial Numbered 992B examples were put together at Hamilton using material essentially left over from the last 4992B U.S. Government Contract. To many collectors these "4C Prefix" 992B movements from that final "clean-up run" represent the last Great American Railroad Grade Pocket Watches. As such, they occupy a unique place in our hearts, our minds and our collections.

There are also some "S Prefix" 992B examples to consider. Whether or not the "S Prefix" 992B examples are genuine, when and where they were put together along with circumstances surrounding them has long been debated. Indeed, we we have established the authenticity of correct "S-Prefix" 992B examples assembled using left-over 950B pillar plates and whenever they can be shown as having been properly assembled of correct components these should be included as well. Sound information on this and other matters of interest is always helpful in establishing and adding to the historical record.

Here is our database on those fascinating 4C and S-Prefix 992B movements:

CLICK: "HAMILTON "4C PREFIX" AND "S PREFIX" 992B POST-PRODUCTION DATABASES"
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Everyone,

The reason for formulating and publishing the above listing is to reference Hamilton information previously available in the Gelson List and then also provide a year-by-year movement number "guesstimate" heretofore unavailable for the remaining years of Hamilton 992B Watch Production. Hopefully the above list and what follows will assist in spurring debate as well as additional sharing of information and any available documentation particularly for the post 1954 years.

During July of 2004 all number sequences from 1955 through 1969 were posted as estimates open to re-interpretation. We pushed, we pulled and we adjusted the numbers, revising them with minor tweaks throughout the following year. Now, during the nearly 10 years that have passed these numbers have stood the test of time and we feel they are accurate enough to continue their use for the years to come.

Anyone with recollections, receipts, invoices or any other information to contribute is encouraged to do so. Unfinished plates and the numbers on them are also interesting and they play a role in this fascinating subject as well. Your comments, questions and theories are always welcome at ihc185@roadrunner.com our IHC eMail address.

After all, we are all learning something new every day,

Lindell

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(Entire topic © 2002-2019 IHC185 All Rights Reserved Worldwide)

Image of the four basic 992B types courtesy of Fred Hougham. (Additional images and references may be aded later.)

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