Webley Mark 3 Club
I've got an old Webley catalogue from the 60's (I think). It describes the "supertarget club model 0.177". "It is constructed with a heavy barrel and is complete with six hole aperture sight, tunnel foresight on special ramp, and attachment to the stock to hold interchangeable foresight elements." However, the basic Mark 3 can be fitted with an aperture sight if ordered with the rifle. This looks like a single hole sight from the illustration. The model number for the six hole sight isn't specified in my catalogue.
Ian
Life is to be enjoyed, not endured.