This
@treerootCO pic shows the FJ40 versions of the inspection light.
1/61-3/69 - fixed hook at the top, movable hook on the base, brown cord, molded plug, each plug blade has 1 hole.
Marked on the bottom of the base, PAT.NO. 459178 around the TR logo.
Early lights have a lighter brown cord than shown above.
Cord may be unmarked or marked NIHON BIND DENSEN, TOKIWA, TOKUDEN or have other marking.
Plug has TR logo, marked TOKAIRIKA CO., LTD NAGOYA JAPAN
Part # RK 55701 or 81370-60010 Lamp assembly, inspection.
Bulb is 12v 24w.
Blue bag has vertical lines, marked TEQ and TR, round corners.
3/69-7/80 - black cord, 2 movable hooks, 1 at the top, 1 on the cord, molded plug with TR logo, marked 6V-24V. Part # 81370-60010. Parts catalog shows a change in 9/71. The unit stayed the same, the bulb changed from 12v 24w to 12v 23w. Later lights have "12 volts only" tag on the cord near the plug. Blue bag has vertical lines, marked TEQ and TR, square corners.
7/80-8/84 - black cord, 1 moveable hook at the top, molded plug with TR logo, marked 6V-24V, "12 volts only" tag on cord near plug. Part # 81370-60010. Blue bag has honeycomb pattern, marked TEQ and TR, square corners.
current - black cord, 1 moveable hook at the top, reinforced molded plug, "12 volts only" tag on cord near plug. No blue bag.
There is also an FJ25 version. Like the brown cord FJ40, except the plug is not molded. Plug has two-piece cover, brass screw and nut, with brass blades. No hole in the blades. The plug has the TR logo, marked TOKAIRIKADENKI NAGOYA JAPAN. Part # FJ24 55700 Lamp assembly, inspection in 1958 FJ25 parts catalog. Bulb is 12v 24w. Have seen only 2 examples of this one, neither with the blue bag.