It has the traditional appearance of a century-old, oil-fired light.
After WWI, in an effort to keep up with the new development of electric and battery-powered amenities on yachts and small craft, marine lighting companies began offering navigation lights with electric units. Manufacturers made oil-fired lamps with a combination electric-and-oil font with burner. Later, the all-electric unit was adopted for the old-style light.
Here's an example – an all-electric anchor light wired for 12 volts. It has the traditional appearance of an oil-fired light, similar to those of 100 years ago. The major difference is the bayonet-type light socket inside the light instead of the burner, and the acrylic lens.
These lights were made by Perko for many years but were discontinued about 30 years ago.
This example has been to sea. I thoroughly reconditioned it after salvaging it here in Maine. It would be the perfect anchor light for a classic small craft. Or easily altered for home use.
A word of caution: Don't attempt to use an oil burner in this type of light. The acrylic lens was not meant for direct flame.