I have been able to obtain a mount for the Kollsman Periscopic sextant and was also able to source a service handbook. This I have produced in A5 format, Black and White 37 pages. Subjects covered include, Description and Operation. Disassembly. Cleaning. Inspection. Repair. Assembly. Fits and Clearances. Testing. Trouble Shooting. Storage. Special Tools and test Equipment. 
There are many diagrams and the resultant 44 page booklet is clean and easy to read.
https://g4osj.co.uk/Text/Catalogue.html   has my catalogue of other handbooks.

Postage (UK) 1.50 

Please note that unless specifically stated otherwise in my listing all printed material is a copy. NOT original material.

Aucun de mes livrets ne sont originaux à moins d'indication contraire.

Keine meiner Broschüren sind Originale, sofern nicht anders angegeben.

Nessuno dei miei libretti sono gli originali a meno che così dichiarato.

Ninguno de mis folletos son originales a menos que así se indique.

Ни один из моих буклетов не оригиналы, если это не указано.

我的小册子都不是原件，除非这样说。

 Some feedback for this booklet:-

:   VERY PRO.  All ok-no problems.  All three items are super cool! I love them! Highly recommend this eBayer!   Great book! Thanks for the super service!  As advertised. Promptly shipped.    As described, fast shipping, recommended seller. Excellent seller.  Excellent information, very useful, happy customer.  Item as described, fast 1-week shipping to USA, would buy from again.  Exact description. Timely, well packed delivery. Excellent eBay seller! A+++. Great service! I'd definitely buy from this seller again. A+++ all the way!  OK.