A very old PC, probably 250W or 500W.
Unfortunately, the lens is cracked.
The construction is based on folded metal sheets, assembled by folding, welding and rivets.
The yoke have a integrated base plate, this may be a signe it's a film/photo lighting equipment.
The lamp carriage is also quite interesting, it is really similar to the one from the unknown 04 lantern. To focus the light, you need to open the back door, to be able to slide the lamp carriage, there is no external access for the focus setting.
- Lens: Clear PC lens 120mm