The Museum of London holds a complete four-part alnage seal, MOL 89.340/1, which appears to have an inner disc that parallels this one. It is described as follows - DV (scratched) // WH, BARKS BUCKS OXS around // Arms of Stuart Britain // H, ...ENG... around.
A lot is known (relatively speaking) about the alnagers William Howes (father & son of the same name) - see BSG.CS.00028.
There is a precedent for joint area alnage seals, see BSG.CS.00381.
