Alfred J. Parker Model T.Z. 3/53. A J.P. Micro adjustable target sight which is just about impossible to find today, made to fit the P14 (‘American Enfield’) service rifles / actions. This is in excellent condition with the fitting screws. From the A J Parker catalogue:
“The model 3/53 “Twin Zero” aperture back sight is the latest improved model for the P14 rifle. It supersedes the previous models 14/35 and 3/49. The sturdiest and best made aperture sight for the P14 rifle, embodying all the latest improvements in sight design. The high quality and fine finish that has made the “Twin Zero” sights famous. Definite and accurate adjustment, half minute clicks, neat and clear scale markings, easy and definite quick release action lever controlled. Can be fitted without difficulty at home”.