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russell_w_b · 28th Apr 2019, 9:20 am

The trigger dial photo in 'Atkinson' has 12 C44/1 stamped on it. 1944 manufacture?

'The Telephone Handbook' by Herbert and Proctor was written in 1944 and it only mentions slipping cam dials; doesn't even mention the number 10. So given the inertia of publishing, I would guess 1944 to 1948 as the dates for development and rolling-out.

28th Apr 2019, 9:20 am	#4
russell_w_b Dekatron Join Date: Jul 2007 Location: Penrith, Cumbria, UK. Posts: 3,687	Re: When was the No 12 dial introduced? The trigger dial photo in 'Atkinson' has 12 C44/1 stamped on it. 1944 manufacture? 'The Telephone Handbook' by Herbert and Proctor was written in 1944 and it only mentions slipping cam dials; doesn't even mention the number 10. So given the inertia of publishing, I would guess 1944 to 1948 as the dates for development and rolling-out. __________________ Regds, Russell W. B. G4YLI.