Parker-Hale instruction manual on Service Rifles

[Macabre of Auchterloonie]

Recently bought a box of (mainly) fullbore rifle cleaning accessories,
mostly made by Parker-Hale, but some of WD provenance - since everything
is made no later than 1961...

Oils, rods, brushes, mops, other tools, and a hard-covered 'book' (as
subject line, List No. 240A, 24th Edition 1961) incorporating a circular
slide-rule in the front cover, which *seems* to calculate windage...

Lots of useful info', and only one page of the scorebook troubled by the
scorer. (Bisley, 10/7/61 (Southern Railway)

Separate club scorebook also lightly used, again at Bisley, competitor
using Lee Enfield Mk4 (No4?) 10/7/1961, and Mk9 (?) 11/7/1961

Book's in nice condition, and even the sandpaper pencil-sharpening patch
on the back is pristine.

Anyone any idea if the book is close to collectable?

--
Old Nick