Incabloc was 1934 or thereabouts. This is not incabloc however, looks like a Duro/Ruby/Super/Parashock2 or any of those that are similar. Incabloc or alternative was really essential post 1950 for manufacturers. Prior to that is was still possible or even common to buy watches without shock protection.
I accept that incabloc is written on the back. However what is fitted in the movement photo is not incabloc - it is an alternative shock protection system. The incabloc spring is very distinctive. It is possible this is not the original movement, or perhaps the back was swapped. The watch & movement would normally be too high quality to have 'diamond tooled', or 'precision craftsman' advertised on the back. That is the sort of stuff I would expect to see on a watch with a pin lever movement (although to be fair, incabloc would also be an odd thing to see on a pin lever movement of this era). In fact, saying water-resistant rather than waterproof would place the watch much later - 60s, I can't recall exactly. So, all in all, I don't think this is the original back.
Yeah, that's what I find confusing too, trim. I've done a little reading about waterproof vs water-resistant & dating. Like I said earlier, the dial reminds me of my '43 UG, but other details make me think 1968 or so. Very confusing.
Trust me, I'm not arguing with you or anyone else here. I know you guys know your stuff. I'm very new to all this!
I think the simplest explanation is someone has replaced the back at some point.
The rest - dial, hands, movement case style all point to early 50s. It is only the back that confuses things. Unless the back has Ellis stamped inside, then a replacement back is the most consistent and simplest explanation for the current configuration of the watch.
P.S. you should feel free to argue - much learning is possible this way.
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