Two Photogenic Powerlight 1250 DR's with one umbrella reflector and two speed rings.
I bought my first real studio strobe (electronic flash unit) back in 1979. It was a Novatron 120, pack and head system with one flash head and a box that generated about as much power as a brawny battery powered light that you'd put on top of your camera today. The box, with two connectors for flash heads, was gray metal and the flash head, with its 20 foot cord had a black plastic case and a polished reflector. Of course there was a flash tube and a 60 watt light bulb that served as a modeling light.
For the first twenty years of my photographic career in the studio I used only power pack and head systems. After the Novatron I bought an 800 watt second Norman flash and two nice, metal heads that had built-in fans. I liked those so when I started to get busy I added more stuff from the Norman system. I eventually ended up with two of their PD2000, two thousand watt second packs and a collection of eight heavy metal flash heads. The PD800 also stuck around. At that point in my career we were shooting advertising projects nearly every day and sometimes for ten or twelve hours at a whack. Flashes had to be robust because when we were shooting still life with 8x10 cameras at f64 we might need to pop the flashes (in a dark room) a couple dozen times at full power to get enough cumulative light on the film. There was this thing called