Interesting that the serial number is in the 20,000 range. Does that suggest that at least that many receivers/bodies were forwarded from RSAF(E) to Fazakerly to be completed/built up into rifles?
We know that No1 MkVI and No4 MkI bodies were both sent. Did RSAF(E) clean out their inventory of rifle parts entirely to Fazakerly when they changed over to Bren production, or did they send some to other start-up factories as well?
One wonders also at what date RSAF(E) ceased to produce No4 bodies and components?
Or did they retain the No1 MkVI and No4 MkI parts until they had finished the conversion of the 1400 odd No4 MkI Trials rifles to No4 MkI(T), and these parts arrived at the other factories after No4 production was already under way and this explains the higher serial numbers?