"Runbaken": that surname is of Swedish ancestry.
Although based in Manchester, could Runbaken have had a manufacturing plant - or parent company - in Sweden? If so, that might explain the millimetres, even if the front panel ledgending is in English: i.e. Swedish design, ledgending changed for the English market - but the metric units remained. Swedish engineers would have known that the metric system was not unknown in the U.K. in 1944, even if it was not the default system for measurement in the U.K at that time.
All very curious.
Al.
Although based in Manchester, could Runbaken have had a manufacturing plant - or parent company - in Sweden? If so, that might explain the millimetres, even if the front panel ledgending is in English: i.e. Swedish design, ledgending changed for the English market - but the metric units remained. Swedish engineers would have known that the metric system was not unknown in the U.K. in 1944, even if it was not the default system for measurement in the U.K at that time.
All very curious.

Al.






