I thought I would start up a conversation and see what pics, info and input we can produce on this sticky about very early 'Production' pillar plates, specifically pre 1961 non date stamped plates. We all know that the early M1 & M2 date stamped pillar plates generally used that unique location of lower right of top center.
And in or around 1963, they moved the pillar plate Date stamp to Top Center
So recently I have been researching and asking around for info on (M0) date stamped pillar plates. I started out looking for one to buy but all inquiries came up zippo,nothing. And add to that, nobody I talked with even had a pic of a M0 date stamped Pillar Plate. I assume there are some out there but as of this typing, I can't find a pic of one or talk with anybody that has a pic or some don't even recall seeing one. I can't say I have ever seen a M0 stamped pillar plate but I was never really looking for one.
So with that info, I ask the first question: Does anybody have a pic of a M0 date stamped Pillar plate????
Then I started looking at old factory advertisement of 1960ish Bulovas to see what I could find. That and some pillar plates I did come to acquire seemed to invoke more questions then answers.
So here's some pics and observations. I hope any of you can add to this info and maybe we can get a better idea of what was happening during this early time in late fall of 1960 with these pillar plate design and production use.
Factory ads of the early Accutrons. *Note the drilled hole at the top right of center usually where the M1 & M2 date stamp would go on later pillar plates and also the lack of the two small holes at the bottom of the pillar plate.
So those factory pics show a pillar plate similar to the 114P plates as talked about in this other thread: Odd Pillar Plate Thread
And then I found these set of pics. I own the blue background pics of the two non dated pillar plates and the other was a ebay auction of a 214 watch with good non dated pillar plate pics. None have date stamps, non have patent numbers and all have the front cutout and the back has the drilled hole at the top and are missing the two small holes at the base of the plate. These sets appears to have been used in actual watches and were part of the production line, but no date stamps. So where is a pillar plate with a M0 date stamp and what does it look like?