blue lenses

[von birch]

i got a neat set of blue-tinted lenses at hershey for a couple bucks...dont know what they fit, but might try to use them on my 30 model A. they're 8 3/8" diameter. what is stock model A?

these are pretty cool i think, they have a 3 dimensional triangle that sticks out of the front on the lens about and inch. i think they're some kind of model T aftermarket item. they're marked

VIOLET-RAY-LENS
SMITH GLASS CO.
MT. PLEASANT PA.

any info?