Screw back, no markings on outside of back, inside marked- stainless steel back-Bulova watch company-Swiss-51-86380-L1 0n movement, seems to need a mainspring, hour & minute hands pretty rusted, red sweep second hand, dial shows age{patina}. Case has been around the block too. Another clunker I got off ebay.
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12 years 10 months
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13 years 7 monthsSo L1 on inside case back and movement. Date is nailed down. Sure seems to match the ad Jay posted above. Has the stainless back, etc... Jay- what was the date of the ad? If ya remember. I didn't see the date in the graphic file name.
I'm good w/ Water Tight or Watertite....but would vote tentative.
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12 years 10 monthsIn reply to So L1 on inside case back and by William Smith
That is from a 1951 ad here on myBulova. There are several ads out there for this watch. I have seen many of these over the years and have an example given to a friends relative by American Airlines in the early 50's as a million mile award. It is in the original box.
Jay
vintagebulova.com
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13 years 7 monthsIn reply to 51 inside the case back, by bobbee
aha...it says 51 on inside case back. Picture was blurry, but I now see that's what OP stated in additional comments. I'm not familiar with Bulova stamping the date this way- 51 vs L1 (as on mvnt). Bobbee, just confirming- the inside case back of your example says 53 vs L3?