Hi Joe..Is that one of Maryn Bratbys replica filters? It looks similar to the filter used on the WB30..other than the fact that had a shroud over the top to keep the rain out (that stuff you don't see a lot of ) and the mesh was of the perforated sheet type (lots of small round holes)....Ian
Hi Ian, this filter was an original as far as I could tell, it was just two rusty plates when I got it, and the outlet hole was offset. I guess it was off a twin of some sort. I relocated the hole to the center and and made a threaded adapter to the Amal. It is impressed into the metal "Vokes Ltd." and "Guildford". The sticker came from Domi Racer here in the states. The paper element is from a Triumph. Hope I did not demolish something of value.