I have not seen that winged design on a filler cap/pressure valve before, but I have seen it on Tilley pumps and the links below show those, I'm not certain when the winged pumps were manufactured and they could have been later replacement pumps as they were made with both male and female threads. 11 Styles of Tilley TL10 etc., pumps. 4 Styles of Tilley X-246 pumps.