Thanks for your response Christine.
Yes, the "V"'s do look identical. The shaker cannot be too rare a piece as it is the second one I have seen in around 2 years, in Australia, but the former one was too expensive to purchase! If the piece is not Davidson, as I am led to believe, I wonder how Davidson's "V" appears on the base of a non Davidson item. The "V" is relief moulded on the base and does look identical. (I am a printer and I have lots of experience identifying typefaces).
Any suggestions would be very welcome!
Barry