I had not heard either of those terms before today regarding that type of fence, thanks for expanding my vocabulary.
I think gunman would be more able to give a definitive term for the fence having been previously employed by Webley. My source for both terms was picked up only through reading after I bought an Arthur Howell ble that had identical fences.
As I read that Arthur Howell was reputed to mainly work for the trade with comparatively few guns produced under his own name I wondered if he had his actions filed up by the same tradesman or men that worked on Webley’s fences or whether he used Webley sourced actions for his guns.
