Thanks for the posting - I agree your comments. The proliferation of WH marks , like WC and IS drives me nuts !
I now have many buckles with unidentified WH marks from the lost register period - they cannot all be the same man, can they ?
There is the one above , and three given on viewtopic.php?f=59&t=17504
( one incuse, one oval and one cursive)
and another different cursive mark. Of most I have several examples !
Either Harrison broke them on a regular basis and needed frequent replacements or we have at least one unidentified buckle and nips maker out there. Casting skills are vital to both businesses hence many bucklemakers also did nips.
This mark is a bit dubious for William though - found by Grimwade on tea-vases (whatever they were) - it sounds more like a plateworker using raising techniques rather than casting .
I've not seen this mark on a buckle - yet