{Collins} Amateur band markings on 75A4 and 51J2 drums

Can anyone provide me with the band limits for the 
"really old" amateur bands, including what was available
in 27 MHz?  I am working on a drum overlay for the 75A4 and
51J2. (i.e. dating back to the vintage of this equipment.)

In particular 160 m seems to be broken into 3 segments
 and a segment from 26-27 MHz is marked as well.


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