Surpmil,
Another Number for you, It was in a Scotarms auction, a Trials 1931 No4 Mk1, serial No A0676. A really nice example.
1. A0676
2. 1931 (all one date IIRC)
3. No4 Mk1
4. NA
5. NA
6. NA
7. NA
8. ?
9. sold at Auction May 2012 complete with a PH 5C sight.