Beautiful collection (and a fantastic thread, by the way)! Here are my two:
Originally Posted by Taswell
The Healthways 100 (1955) has taken a beating, but the Seapearl 600 (1957-58?)is a real beauty. Both have watertight EPSA bayonet cases with the AR 1010 inside:
My Seapearl 600 is later than 1956 (maybe 1957-58? I haven't wrestled the back off of it yet to check the EPSA date inside), as it has the word "Sherpas" on the case back, referring to the Swiss Everest expedition of 1956.
Interesting side note: the leader of the Swiss Everest expedition describes the Enicar watches that his group used as "
wrist-watches, some of them fitted with a thermometer." Presumably "automatic" is an error (?), as it is commonly held that the climbers wore manual-wind Seapearl 600's. You can read his account here (Enicar mentioned on p. 35): Full text of "The Everest Lhotse Adventure"
Back to diving... The report entitled "Miscellaneous Comments on Several Submersible Wrist Watches," released by the U.S. Navy Experimental Diving Unit in May 1959, is interesting reading and is available here: Miscellaneous Comments on Several Submersible Wrist Watches. .
The really juicy stuff, however, is the earlier report entitled "Comparative Evaluation of Three Commercially Available Swiss-Made Submersible Wrist Watches," released by the same group in July 1958.
Here's the abstract:
In July 1958, the U.S. Navy Experimental Diving Unit recommended that the Bureau of Ships delete the Rolex Submariner 6538 from the list of watches approved for interim purchase (while the Bulova Submersible was being developed for the Navy), and that they add the Enicar Seapearl 600 to that list. As I said, juicy stuff.
The Bureau of Ships followed this recommendation as regards the Enicar, but did not delete the Rolex 6538, much to the delight, I'm sure of any old Navy diver or his kin who still owns one. ;)
The abstract is available here: Comparative Evaluation of Three Commercially Available Swiss-Made Submersible Wrist Watches, . If you want a copy of the actual report, the DTIC will direct you to the National Technical Information Service: NTIS - National Technical Information Service . Hope this inspires you, as it has me, to wear your Seapearl 600 with even more pride.