Prismatic marching compass by H B & S Ltd, with the ref No W10/WKOO172 with the serial no B031 stamped on it
From the bit of research I have done via the net this could be WWII or earlier. These units are solid brass and look well when all the paint is cleaned off and polished.
This is one of the units produced with the MOTHER OF PEARL disc calibrated in mills which is still in good condition and readable with the naked eye, prism is clear and functions.
There are no bubbles in the internal liquid but these units are easily topped up via the filler hole.
The bezel ring rotates freely once the clamp is released
The unit is in good working order.---
THE PHOTOS ARE OF THE ACTUAL UNIT YOU ARE BIDDING ON.
Insured post & packing will be £16.50 via 24 hour courier service for UK MAINLAND, this price excludes the highlands and islands of Scotland, Ireland north and south and all other areas that attract a postcode surcharge