So the hammer fell on lot #178 in Gavin Gardiner’s 4/18 Spring Fine Modern and Vintage Sporting Guns.

Lot 178: Boss & Co., 12-bore single trigger assisted opening sidelock ejector, No. 6364
The results……….no sale! Most likely this means that the final hammer price did not exceed the reserve left on the lot.
I’m not sure what the reserve was. But at some auctions, a lot’s reserve price is the same as its low estimate.
Lot #178’s low estimate was £16,000.
You can read more about this here and here.
BTW: I should add that today a new stock and barrels by Boss will easily cost more than £16,000.