I think you have a CH press and some models used propriatary shell holders. Don't know if the dies were propriatary for that press thread pitch or not. It looks as though you have both RCBS and CH shell holders displayed in the photo.
If it suits your specific caliber reloading needs and you have room for it, use it. The press looks hellforstout.
Just guessing, lots of water under that bridge. Try it.
salty
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