Perhaps a Webley Premier and certain Greeners and Westley's would be BV1*
Note * denotes exceptional examples of the gunmakers craft.
IMO of course, each to his own.
Don,
I think it would be really useful if you printed your value structure in full.
We could all print it off and use it along with all the other paraphinalia we haul along to auctions. Micrometers, bore guages, thickness guages, 4 issues of Nigel Brown's tomes Dig's encyclopedia and all Boothroyds writings. Then none of us would make a mistake all guns would be correctly valued, we would all be content and busy reworking our new finds. And this board would be VERY quiet.