B.S.A Parker-Hale No 9c 1912 pattern aperture sights for SMLE's

  I believe this to be a B.S.A Parker-Hale No 9c 1912 pattern aperture sights for SMLE's, 1912 pattern made for service rifles. I don't have much info on this but it's appears to be be in fair condition, fully functioning with nothing missing. One image shows the mounting screws and spring which is included. Numbers on shown in the image are;
PAT 26943-07
P.PAT 29844-10
P.PAT 30337-10
Ro 575537
Rear of the aperture plate reads Parker-Hale - Made in England
PARKER is stamped on the mount plate with the BSA logo above it on the casing/housing.

Collection from Summerland or postage at buyers cost.