They say that they were all built to the same spec but dear o' deary me....... I don't believe it. Parts weren't always readily interchangeable between the same makers so different makers didn't stand a chance! Anyone else encountered these problems? All the Ordnance spares I ever remember (except the gland packing etc) were from B&C so it was a case of fit them or nothing
The ocular lens cell assembly threads to first draw tube always needed matching/mating upInformation
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