My first headtorch was a two piece affair. A light on an elasticated headband, which had two spare filament bulbs attached to it, along with two 18" wires. The second part was a brown, wax covered battery pack which had two brass threaded terminals. It was about 5"x 3" x 1" and weighed around 1lb.
You attached the wires to the terminals and and put the battery in your pocket or rucksac. Not only was the light not very bright there was no on/off switch. A wire had to be disconnected to turn it off which was a right faff so invariably they were left on and went flat very quickly. Another problem was taking your jacket or rucksac off and forgetting about the wires and snapping them which was a common occurrence.
The light was just about good enough to map read or take a bearing and just about lit the ground to a maximum of 4 or 5 feet in front of you. Oh, the fun we had on night exercises!
I currently use a rechargeable Silva which is great but I am tempted to get a Hope, as I've heard they are the bees knees, but need to find someone who has one first so I can try it out.