Hi all. I purchased a mk5 Sten deac recently and am now trying to find out what I can about it. I am aware that mk5 serial numbers are supposed to commence with "VS". However, stamped "STEN MK 5" on the magazine chamber, the serial number reads "AO2774", which is prefixed by "R.O.F. 67". Unfortunately, I can't seem to find any explanation for this.
Is anyone able to shine any light on this?