Re: Is this an HMV 163?
Posted: Sat Jun 27, 2009 12:08 pm
Oh yes, you're right. You know I've never noticed that before. Now I look at mine I can see that the 5a has a kind of swirly pattern and the 5b inward pointing triangles around the outer part of the diaphragm. And to think I thought I had sharp eyes and I hadn't spotted than in the years I've had both! 
RJ
RJ