Skulldigger
Member
Anyone know what these will fit? I believe they are rear lenses for vintage mechanical sirens. They are just like the ones on my Sireno R5R except they are 1/8" larger. The Sireno takes a 4 to 4-1/8" base and this is 4-1/4" It's a great looking lens if I can find out what it fits. I have two of them. The are nearly cobalt blue color.
4-1/4" diameter base, 3" tall in center.
4-1/4" diameter base, 3" tall in center.