Thanks Yves, I realise it was probably hand lettered still seems strangly familiar also.

I hunted through the Jaspert "Encyclopaedia" and about the only typeface that made me look twice at it was Albertus, and it's not too close. I guess if I had to try to re-create this, that might be where I would start. The high-centered M with straight sides is not very common at all in serif fonts.

The typeface this reminds me most of is Benguiat, probably because of the distinctive M. But Benguiat isn't really that close....