Model: ML-420B/AMT-4

Special Features:

Plastic disks; plastic case; bottom disk 11 in. Diameter 0.1 in. Thk; 2 cursors; 3 disks; 1 sc ea temp p60 to m90 degrees c range 0.5 degrees grad black grad white background, temp m60 to m100 degrees c range 0.5 degrees grad red grad white background, freq 0 to 90 recorder div range 0.5 unit grad black grad white background, humidity sc 15 pct to 100 pct range 5 pct grad black grad white background, temp m50 to p40 degrees c range 10 degrees grad black grad clear plastic background; govt type jetds humidity-temp computer type ml-420b/amt-4; p/o jetds radiosonde recorder type an/tmq-5 and an/fmq-2

Properties:

Inc 03938 cancelled/replaced by ,inc 00425, fiig a30800, app-key a ,on 061213 ~(all except usa) for usa inc 03938 canceled replaced by slide rule: inc 04375, fiig t302, appl key fa.