[Hallicrafters] SX-101A variants

[Jeff]

Just curious if anyone knows the history of this --

Recently picked up a SX-101A.  I also have a SX-101 MkIII.  The SX-101A 
has a completely different style of knobs than the SX-101 -- the knobs 
on the 101A are similar in style to the SX-117 (square edged, stub on 
the main tuning knob.

They look like OEM parts, but I was curious since most of the depictions 
on the Internet that I see of the 101A have the same knob style as the 101.

As I said, just curious.  The 101A is in very good shape, but I found 
this perplexing.

73!

Jeff
WB3JIH