Could well be a TR replacement from Meybauer.
@ Mike, do you have a sharper photo of the obverse please?
Greg is right, obviously This is how slim Imperial Meybauer became fat in TR era. Itīs same with some women. When you see one 20 years after, you canīt believe how such slim beauty could grow to this dimension - so your first thought naturally is that it must be a Frankenstein. But then you find out it is absolutely normal, hehe.
Now seriously - this type usually sell on ebay for 120 - 130 - if unmarked. I saw it once marked L/13 and it ended at 500 .