As Fred and Steve noted, you have a bunch of "house-numbered"
transistors, and one that's relatively easy. Actually, the MA900 seems
to be from a series of germanium parts. I have numbers on both sides
of it, but not that particular one, in my book. I do have a full
Motorola data sheet on the 2N1192, in my 1969 Motorola "Semiconductor
Data Book." Since I'm about to scan something else, I scanned it into
a PDF (as images, not text). It's not great, but it's legible. Email
me if you'd like a copy.

Cheers,
Tom