[KrisJG3]

So good message Danny - please inform me about serial numbers for both Lancasters AVRO.

For sure only one of them (I think) had following OX-valve/ regulator with serial number as below:

6D Aircraft Gaseous Apparatus and Ancillary Equipment
6D = Oxygen Equipment

from one oxygen valve/regulator info:
Mk IX/AA * or ...X/AA* or XX/AA* (not easy to read) ---- Mk IX

Early or late oxygen regulator

6D/221
36281/42 (early OX regulator - made in 1942 ??? )

See:
https://picasaweb.google.com/1128626...45330298706962

https://picasaweb.google.com/1128626...45344755172626


Question:

Is it possible that here can be a/c serial number ( I do not belive but ... ?) :

https://picasaweb.google.com/1128626...71393160888834

31 July 1944 / JB746 /Lancaster/ 103 Sqn del'd 11-12-43/ PM-I/, SOC 4-8-44 /Shot Down /Day/ Le Havre / Unknown

I think it should be:
Avro Type 683 – Lancaster Mk. I

but which one (the moust ammo with year of production 1944 ) ???

Best wishes from Pommern,

Kris