Unless you can get your hands on the old Wards records, doubt you'll find much. And even then, I doubt you'd find anything specific enough to give you much more than a range of dates during which Wards marketed those Miroku doubles. I'd be really surprised if you could find anything tied to SN's. And since Wards was the dealer and not the maker, SN information wouldn't be of much use anyway. The store brand crossover list in the Blue Book is of no help. Doesn't even list any Miroku-made guns under either Wards or Western Field.
