Great news! You normally have to start making one before the original turns up.
:rolleyes:

Also these
https://www.ebay.co.uk/sch/i.html?_nkw=222745807237
This one looks a bit crappy, I have a couple of better ones. It is a nukes controller from the Tornado GR1(not Buccaneer) with the front panel put on backwards and painted silver. You can see the two terminals for the panel light.

An expert will be along in a minute with the exact film reference.

2 BA AGS248 – These are brass countersunk, that doesn’t sound very strong does it?

You might also be able to decode the nuts from the attached drawing fragment.

Mills Equipment Company, suspect these are generic

Yes sonobuoy, the clues are on the front. Don’t know any more than this …

http://www.military-airshows.co.uk/press06/newarkshackletonprnov2008.htm

Might be American equipment, otherwise must be pretty rare.

The one above the suuction looks like de-icer
https://www.ataviation.uk/listings/p66-pembroke-c-mk1/ (you can see it better if you blow it up)

The one above that has been a Decca Zone Ident Meter on one panel but that is square and your hole is round.

The one behind the throttle is an electric turn and slip indicator.

I found the reference here http://www.natolamps.com/wp-content/uploads/yootheme/TableA-6240-99-995-25-50V.xls and assume it relates to a pattern of Harley lamp or bulb.