I have and still use one of those original Leica bags. It was sort of a promotional item at the time, priced at $17.50 retail. Then Nikon came out with a boxier canvas bag for $12.95. At the time most people were still using leather "gadget bags" at three or four times the price to schlep photo stuff.
A lot of shooters were buying military surplus bags, cheap and plentiful in the 1970's. A very close aproximation of the Leica bag in olive drab canvas could be had for $2.95. Younger photographers for the most part used them and they were popular with women as purses.
Nobody seems to buy Zero Halliburton aluminum cases, or the cheap knock-offs, anymore either.