[Milsurplus] SP-600 Question

[Tom Brent]

I bought my first Hammarlund SP-600 almost 45 years ago and I have owned 5
or 6 others since then. Recently I came across a JX-14 that has a
bandspread dial calibrated for the amateur bands, something I have never
seen before since all of mine have had the standard bandspread dial that
consists of nothing more than a logging scale. How common are these ones
marked with the ham bands? Were the dials supplied by Hammarlund or are
they an after-market item?

Regards,

Tom
._._.