Like the maker, this pen is a source of obscure confusion to me. The barrel impression is not at all forthcoming, giving the maker as “W.F.P.Co.” and the model as “B-B”. I had struggled along for some time thinking that the example I had was a Big Ben, this being one of the few models of Wyvern I’d heard of. Shortly before re-writing this site, an informant I will name only as Retired Roger in Wales provided a relative trove of information. He had seen an ad from a period publication showing this pen as “Britain’s Best”, a more budget conscious model than the Big Ben. This accords with the slight plating of the clip, and the slightly retiring identification of the maker; Parker and Sheaffer invented entire new model lines just to keep their budget efforts from being connected to the more valuable models, so coyness on Wyvern’s part is entirely in keeping with industry practices.
Production Run: Roger’s periodical did not have a date on it, alas. Somewhat to either side of 1940 is my best guess.
Cost When New: 2/6 (which decimalizes as £0.125); not a lot of money at all at any point in the previous century (for modern value, if you’re willing to guess at the date, try this calculator).
Size: 12.8cm long capped, 14.8cm posted, 11.8 cm uncapped.
Point: 14k gold.
Filler: Button, capacity approx. 1.2 ml
If you are relying on the preceding information to win a bet or impress a teacher, you should read the site’s scholarly caveat. Remember, this is the internet, and it’s full of bad information.