Blind Flying Panel Info??

A friend of my Dads has recently passed on to me a Blind Flying Panel which his father had in his garage for many years.
Having had a quick look on the internet I have found it is the early straight edged type stamped AM 6A/616.

It has all six instrument in place and having looked over them I can only find AM inscriptions on three

Air Speed Indicator – 6A/1268 K.D.G
Artificial Horizon – 6A/599 (15194/42)
Direction Indicator – 6A/602 (14475/40)

(Having looked further I believe the Turn and Slip Indicator to be a 6A/675 with a white face?)

and the Kollsman Altitude instrument is a MK XIVA

The turn and Slip indicator has the hand scratched letters THFB in the Bakelite.

I thought the experts on here may be able to help me identify an aircraft type this could have come from.

All of the cables on the back have been cut to roughly the same length which leads me to believe that the panel has remained intact since it was cut from the aircraft. Pipe work between instruments is also in place. The turn and slip indicator also has a very fragile cloth bag and paper label attached which at some point (but no longer) contained screws to help remove the instrument without damage.

I can try and post a picture up if it would help?

Many thanks

Matt