Abrams Late-80s

[GazB]

Hi, I have some questions regarding the variants of Abrams around in the late-80s, specifically 89.

Ordinarily I would presume that the Army had access to the M1A1 at this time, but I've read that the M1A2 entered production in about 86. Obviously it's not the one we're all familiar with, with the round CITV.

My questions are: are these dates correct? And if they were in service did the M1A2s have any specific external differences at this time compared with the M1A1?

Second, did the M1A1s or A2s of this period have any form of commander thermal sight, specifically the box version, or was it left with the cap?

Any help would be appreciated

Gaz