The four makers' names that have Brand Value level (BV) one (150% of level two, 200% of level three, 400% of level four, and 800% of level five) are Boss, H&H, Purdey, and Woodward. Note that there is no correlation between name and qulity of any individual gun. All makers were able to deliver a best gun. Only a few had the reputation to have a high % of their orders for best guns. With the possible exception of Boss, all makers supplied a broad range of Initial Quality grade (OQ) guns. The above applies to both SXS and O/U guns.
A warrant is not an indicator of a maker's ability nor is it some "overall" quality endorsement. It is much more like an advertising endorsement issued in hopes of a price break.
Note that for Brit guns, name has about a two-fold impact on value and Original Quality and Current Condition (CC) each have about a twenty-fold impact.
