Cigarette box

[Justin Bowater]

Hi, I have recently been given this cigarette box. I am new to identifying all the markings and from the pictures shown. I am currently assuming the following:
Hallmarked in London
Date early 1900's but not sure whether this mark is n or h
P&B anyone know, because I cannot identify it from any of the silversmiths you mention

Look forward to hearing something in anticipation!

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[Granmaa]

I don't know the maker, but it was made in 1963.

Miles
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