[LargeFormat] Bausch and Lomb Portrait Lens

[Clive Warren]

Buried under mounds of paperwork here and haven't even read my Email! 
Have surfaced only because a rather interesting Bausch and Lomb 15" 
f5.6 E.F. Plastigmat Portrait Lens was given to me by the postman 
today. Some people watch the tv - for me it's lenses ;-)

Usual question - anyone know anything about these lenses? It is about 
6 1/2" long and 4" across at the business end. My guess is that it 
dates from the 20's and that it is soft until stopped down. Not 
enough light here to check it out. Hope to be using it tomorrow if 
all goes well.

It is currently sitting on a Korona 8x10 field camera with a 4x5 back 
- if anyone has a Korona 5x7 or 8x10 back for the 8x10 that they 
would be willing to part with then please let me know as it would 
probably make me a happy chap.

Cheers,
        Clive