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Interchanges with Carlson’s Huglu style threads if threads are at the top of the choke (Flush choke is 2″ long w/ threads at the top of the choke) . Marked V1 – likely Huglu
If threads are at bottoms of the choke possibly interchanges with Carlson’s Remington Choke (Rem Choke) (Flush choke is 2″ long w/threads at bottom) marked as V3. Some V3 are proprietary and will not work.
Call with your factory choke in hand to help identify further.