Left hand with retention strap. Closed bottom. perhaps a duty holster?
I did a search but found nothing.
It looks like this one on Flea Bay. It is not this one nor is is this my listing, I have nothing to do with Flea Bay. Link is only for the picture.
DON HUME MIAMI OK PISTOL ? HOLSTER - eBay (item 120668615701 end time Feb-05-11 20:46:16 PST)
Marked on back H701 No 14