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Proton RS-420

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Portable AM/FM stereo radio with battery operation and external antenna connectivity

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eBay

Proton RS-420/RS-421 Clock Radio Preliminary - OEM $15 Mar 29, 2026

eBay

Proton RS-420 Stereo Clock Radio Alarm AM FM Vintage Retro 1989 Tested Works $35 Jan 17, 2026

eBay

Proton RS-420 Stereo Clock Radio Alarm AM FM Vintage Retro 1989 Tested Works $40 Feb 28, 2025

eBay

Proton RS-420 Stereo Clock Radio Alarm AM FM Vintage Retro 1989 Tested Works $39 Oct 26, 2024

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