[QUOTE=ianuk1975;309819]Just acquired a No.4 Mk1 deac from a dealer here in the UK(for my father, actually). The dealer advertised the rifle as being made in 1942 at the Fazakerley factory and being all original except the bolt. Also, he stated the woodwork was beech, but later said it might be ash. On receiving the rifle, there is no date stamp. I contacted the dealer asking him how he established it was a 1942 and he said he got it from the serial number, but he hasn't responded to me asking him how he did this. So, what can you experts out there tell me from the pics I took below...
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https://www.milsurps.com/images/impo.../svUd1Ij-1.jpg
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Those round inspection markings indicate to me that your rifle started life as a Maltby No4MkI