[CBQ] Re: Watches

["glen brewer" <gbrewer@yahoo.com>]

A railroad man's watch was a precision tool, a requirement for employment and a 
big investment. Buying one before reporting for work the first day must have 
been quite a strain on finances.

Specifications for US RR watches varied a bit over the years and from road to 
road, but by mid 20th century were pretty much: US made, lever set, size 16, 
plain open face, wind at 12, arabic numerals, at least 21 jewels, Brequet 
hairspring, double roller, micrometer regulator, adjusted to temperature, 
isochronism, and at least 5 positions. Most railroads by then simply listed 
acceptable makes and models.

See my story, Grandfather's Watch, here: 
http://www.railroadphotoessays.com/f...read.php?t=986
As I said, standards changed over time: Grandfather's 19 jewel Burlington was 
acceptable at the time he bought it. 

More practically defined, isochronism refers to the watch rate variation of a 
tightly wound main spring as compared to one mostly wound down.

Glen Brewer





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