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AFAIK:
If the barrel's 26" long, it should be a takedown a Model 1899B.
If the barrel's 22", the shotgun-butt should make it a Model 1899C.
If the barrel's 20" long, it should be a Model 1899F.
Below is a similar 1914 Model 1899H (solid-frame/non-takedown) with a 20" bbl, that I bought a few weeks ago @ a Cabela's.
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