In reply to Doug:
I thought they were German too, only by the sound of the name. I bought a second hand pair in 1969, so they would have been earlier, and at the time the advantage over Grivels were that you could adjust the length yourself. Both makes had front points. I bought a new pair a couple of years later and was quite surprised to see how long the points should have been! I kept the old pair for climbing on iced rocky ground as the short spikes seemed handier, and as they were already pretty short it didn't matter if I ground a bit more off.