Cari-in-Oly

Almost, Janey. The light bracket is held in place with just the one same screw used for the inspection plate. Same as the Singer lights. Getting these type of lights apart is real pain though, and getting them back together is even worse. They occasionally come up on Ebay or Etsy but usually aren't cheap since there's no modern blue ones.

Cari

Edit again - Thinking about it, I don't know if the blue ones even come apart.