Here is some details showing the stampings.
I did try to see if it was a weapons school, no luck yet. the initials would also have to work with N.A.R.J.W. etc.
Why would it be marked in so many places, (by the Factory?) and do other examples have similar markings?
Here is an excerpt from the Admiralty Fleet Orders requesting removal of these types of gyros from Destroyers in Mar 1945:
1401.—Torpedo Stores—Chests, Tools and Spare Gear for Gyroscopes—Withdrawal
Leaders and Divisional Leaders of Destroyers
It has been approved for the following items, viz. :
Chests, tools and spare gear of gyroscopes :
A.R. and S.R. :
A.R.W., N.A.R.W., A.R.P.W.
N.A.R.J.W. and N.J.W.Sc.
to be withdrawn from Leaders and Divisional Leaders of Destroyers.
2. Vessels concerned are to return any chests referred to in paragraph 1 at
present on board to the nearest Torpedo Depot.
3. The Naval Proportion Book, Part IV, will be amended.
This type of gyro was used in Whitehead torpedos from late 1800’s up to 1940’s, and it looks like this style of box from at least 1912 or earlier.