There was a standardizes numbering system that was used by a few different wrench manufacturers back when, and which still is used in some cases today, by companies like martin, and those wrenches seem to used it.
I don't know who manufactured those wrenches, but the round shape of the one wrench, and tapering handle, reminds me of old J H Williams wrenches. Bonney used a similar shape, but I'm not sure whether the wrenches were as rounded.