The Mellotron Group

I have several. None for sale.
 
 
In a message dated 6/19/2011 9:31:56 P.M. Eastern Daylight Time,  
barrickjohn262@gmail.com writes:

It's a Bulgin Switch.  I thought Polyurethane was a foam.  Acrylic was 
around in 1970, but yes, it could be a transparent  polystyrene.  Someone turned 
up about seven of these things on ebay a  couple of years ago.  They were 
the complete switch.  It's the only  reason I have a little red cap now.  I 
think they went for between $20  and $25 each.  If you could keep the cost 
low enough, I'm sure you could  sell all you wished to  produce.