If you have a Serro Scotty from the 1960s or 1970s, these Arrow #53 clearance/marker lights may be just right for your trailer. They are very nice quality and come as a complete unit with an aluminum backing plate and nylon pigtail, sponge rubber gasket and stainless steel lens screw. The light will mount to curved surfaces with a minimum radius of 12".

Dimensions are 2-3/4"W X 4-5/16"L X 1-7/8"H.

Two 3/16" mounting holes are 1-1/2" apart.

Electrical: