Ministry Of Defence
Radiac Calculator
No. 2
6665-99-949-1446
Front View
This calculator is for fallout dose rates.
Manufactured by: B.R.L.(Blundell Rules Limited) of England
Still operating as Blundell-Harling Limited
Rear View With Instructions For Use.
Note:
This unit is marked B-R-L Weymouth, England
This would put it's manufacturing date between January 1956 and January 1964,
when the company became Blundell-Harling Limited.