This is in the Military style with the enclosed case. The crystal is removed from the front giving access to the movement. I know we've been calling these Military but they're not stamped in the back so hopefully we can find a civilian name for this watch. I think this is a rarer black dial as I haven't seen a black dialed model of this watch until this one and numrous white ones. The crown is missing and it needs an extreme clean soon. This one will be taking a trip to Timemachines. I also have a white dialed one on the way and will post them side by side when I can.
The hands on the Seabee look more like Plains watch to me.
My 2c
Bob B
SeaBee looks like my watch. Do you know what the date of the circus ad? The early Water Tite (Swiss) & Watertight (USA) had Water Tite on the dial under the bulov signature.
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I hereby designate this watch a SeaBee!
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Again showing a watch (#3) as the 'WATER TITE'.
'WATER TITE' - 15 AND 17 Jewels.

'SEABEE' - 17 Jewels.
The Center Seconds or a Sub Dial variant has no bearing as both have been shown being named the 'WATER TITE'.
ML
The signature and serial number style on the case of the subject watch are very distinctive and match the markings in four watches that I own, i.e.:
- 1941 Watertite (reads "Watertite" on the dial, subseconds)
- 1942 Watertite (reads "Watertite" on the dial, center sweep seconds)
- 1947 Watertite (center sweep seconds)
- 1951 Magellan (center sweep seconds; believed to be Magellan rather than Watertite due to chrome plating and "Stainless Steel Back" inside the case versus "Stainless Steel")
I have not seen this style of signature (inside only sig reading "Bulova Watch Co. Swiss") along with the non-standard, inside the case serial number, in any other model.
The 1942 Watertite ad specifies a 17J movement, as do the later Watertite, Magellan/Seabee ads.