Ding ding ding! You win the prize!
The Robyn Model 4000 (a.k.a. Robyn 4 Bander) is the US version of the Cuna brand. All of the variations of this scanner were made in Japan for various companies that re-branded it as their own design. In this case, it was Robyn International, Rockford, Mich. 49341 USA.
The Robyn branded unit was FCC certified for use in the US on these 4 bands:
LF 25 - 55 MHz (+ 10.7 MHz)
HF 108 - 144 MHz (+ 10.7 MHz)
VHF 144 - 174 MHz ( - 10.7 MHz)
UHF 450 - 512 MHz ( - 10.7 MHz)
It uses the standard 10.7 MHz IF crystals that Regency and many other scanner manufactuers used back in the 70's (Elektra Bearcat scanners used 10.8 MHz IF crystals in their scanners).
ScanCHS