Here are links to images of the two rear sights.
One is of the original type, serial number 114, that I bought second hand. This one has a taller Perspex rear post, so that my 100yd zero was centred closer to the middle of the adjustment range, rather than at the top.
The second sight is of the more recent type, serial number 217, bought from Bedford Target Supplies, with a slightly different bearing on the upright post, and larger windage knob.
if you are willing to pay £240 for the pair, I’ll pay for the postage.
https://share.icloud.com/photos/0Jfq8MFkJCLI7jAuTEzL-84Ww#St_Andrews,_Scotland
https://share.icloud.com/photos/0s0uT3URjVhoUYctjUr-oT-wA#St_Andrews,_Scotland