Check the listing for details. Sextant A-14 overhaul handbook (31). Condition: New. Listed at 12.61 USD. Having bought a couple of these interesting Bubble Sextants, also known as the 5851, A-14 or Navy Mk V, I found, as usual, they didn’t work. I searched the net for some service instructions and collected together several lots in differing states of legibility. I have cleaned them up and presented them in A5 format. Black and White 19 pages, mostly cut away photographs. I have yet to find the parts catalog unfortunately. Enough to get mine going and easy enough to read now. The first page proclaims that contained therin are instructions for Installation, Operation and Overhaul for the 5851 with (or without) averager. See https://g4osj.co.uk/Text/Catalogue.html for more handbooks. Postage (UK) £2.00 Please note that unless specifically stated otherwise in my listing all printed material is a facsimile. 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. None of my booklets are originals unless stated. 我的小册子都不是原件，除非这样说。Some feedback received for this booklet:- A pleasure to deal with! Excellent item full of very useful and hard to find information. Recommended.