QUOTE(Cap'n Krusty @ Aug 29 2012, 07:39 AM)

So, do you guys think the 19mm dual circuit master cylinder installed on pre-1977 911s is the ONLY 19 mm master cylinder out there? While this one should be all the clue you need, there are literally hundreds of varieties of 19mm master cylinders fitted to all manner of cars and light trucks, and one easy way to identify an Ate 19mm unit is to look for the number embossed on the body.
The Cap'n
Thank you for this additional piece of information. I haven't seen the unit. I just got those pictures from the P-car owner who claims there is a 19 on the side and there seems to be the Ate logo in the first picture

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Based on that, I thought this could be a good candidate for my conversion but wanted to make sure.
I'm sorry not to be as knowledgeable in the 911s variations as many of the members here are, and that is why I'm sharing and asking about these pictures.
Now I know I need a pre '77 MC for my conversion and it should'nt look like the one I'm being offered