Just now I noticed a fun TI curiosity

[Matt Agajanian]

In your defense, Dieter, I see your
point. And it makes much sense.

The year is 1974 (or 75).
TI had already introduced the redesigned 50s, the 50A and 51A.
On introducing a robust competitor to the HP-65, the next model number for TI (and to illustrate it was a top of the line model, after 51 comes 52.

So yes, I see why the SR-52 was numbered that way.

Thanks Dieter.