Re: AVO Multimeter survey
A new Avometer Model D for the Megger collection.
This is an interesting one.
Original serial number is 1269-1140 (November 1940). As detailed on scaleplate and in pencil on rear of the movement. The rear of movement also states 17-06-49 and 1949 is also printed on the scaleplate next to the serial number.
This implies the scale was replaced in 1949? but still lined with the original serial number.
Top center of the scale has the A<Crown>M for Air Ministry.
Bottom center of scaleplate has Air Ministry Phenon and under that Ref.10S/10610 and then under that LGC/R/12/67
Bottom left of scaleplate R.A.F.27
Front panel is a Model 40 moulded panel
Rear instruction plate is full length (rather than Model 5 style), but reads 10A/10610. So this raises some questions, when did the specification from 10A/10610 to 10S/10610 change over? Clearly there were 10A/10610 plates manufactured for Model 40 based instruments.
Andy
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