Here is a very interesting one I have never encountered. Yellow gold plated front loader that I received on the original tattered lizard band, which I replaced with an identical one as seen.
I scoured the database, ads and line books and found one reference to this watch in the 1962 Line Book BAWDO_148. It's the only reference to this case style that I find from 1960 - 1964 in ads or line books. It is described as waterproof with a stainless back, which I suspect is a misprint. Watch is all yellow plate and a front loader. It seems highly unlikely it would have had a removable stainless back or two watches in the same case would be produced the same year as waterproof, one a front loader and the second a back loader. Silver linen dial with gold indices, luminous dots at indices and hands. Quite surprisingly, everything still glows.
I hesitate to ever call a Bulova "rare", as they were mass produced; but have to believe this one classifies as very uncommon and is likely a one year wonder - 1962
1962 Bulova 23 "PW" A first for the data base.
In reply to Neetstuf, I thought you… by gunnar
