With reference to the Rate of Climb indicator, it would appear to be a post war Smiths 2,000ft/minute range instrument in an SAE case which would make it Smiths Code 20RC/PC or 20RC Sec/Ref: 6A/2086 (listed as 6A/2086 Smiths type 20RC in AL18 AP1086 Section 6A for Devon C1 aircraft and listed in AP1086 Section 6A dated 1966 as 20/RC/PC with the same Sec/Ref 6A/2086) The suffix PC added for Pressure Cabin.

Attached is some Smiths information regarding these RoC indicators.

Not too sure if that helps or has clouded the issue a bit more!

Regards

Dave

Hi Dave,

1. The RoC is manufactured by SS&S Ltd, London. Type 20 RC/PC dated 3/4?
2. Directional Gyro is a Type 1B, 6A/1666 manufactured in 1945 by Sperry in
Brooklyn, NY.
3. A/H is Type 1B 6A/1498
4. ASI is Smiths, Type 118A9
5. Altimeter is Mk IVA (35,000 ft) ??/3380 (could be Kollsman – it has a large “K” on the back)

A/H & Directional Gyro are both vacuum, not electrical

Any more idea’s??

Many thanks, J