Alternatively, now that this old thread is revived anyway, we could in fact focus on the original question.

It doesn't really matter if it's a piece of $#!1 or the greatest mic in the world. The question is was it changed?
Believe it or not, I mailed Neumann to ask. Yeah, shoot me. Well, actually I mailed for dating of a some microphones (good service BTW), and yes, among those was an early TLM103. So while I was at it I thought I might as well ask:
"BTW, thereβs some rumor that the TLM 103 changed slightly over the years (e.g. slightly different dimensions). Is this true?"
And the kind lady from the head office replied as follows:
"Unfortunately, we have no further information on the history of this microphone."