I can confirm that these chips existed, many years ago I pulled some from boards that I had, that were what I dubbed as Rosetta boards, that is they had designations, eg 4004, on them but the chips were of a different number or manufacture, enabling me to cross reference them. This was particularly useful at the time because companies like HP would get their own numbers printed, in the form 1111-1111 in HP's case,on chips which made repair difficult but occasionally they would run out and would fit a normal 74LS00 instead of the 1234-1234? which they normally fitted. I still have these chips amongst my 4004 collection but the last time I looked, time and tide had removed the printing. Pity. --SleepyPhoenix 14:27, 18 November 2015 (EST)