T17 CK921 Tank circa 1934 post COA and new crystal
Thanks to @Tire-comedon for generously posting original source material and correcting my erroneous identification.
Wearing my Jumbo yesterday... lately I was feeling hesitation on whether to keep this watch in the collection or not. Something wasn't clicking, then I put it on with the strap I usually have on my PR.
And it feels like a complete different watch!
I'm loving it!