Didn't H&H already make the 465H&H? Below as posted in the double rifle forum, are prices from 1987. Are these 465's model numbers or cartridge size?

Jeffery 400 3". Overall good. Original case. AU$3500

H&H 465 Royal. Cased as new. AU$10000.

H&H 465. Badminton Model, detachable locks, new case, excellent bores. AU$10000

Lancaster 470NE Overall Fine cased. AU$6000.

Thanks

Minkman