Photo: Evan-Amos, Public domain, Wikimedia Commons
Base System (Tonka, Hang-On built in)
Tonka, Hang-On built in · 3010-B · Sega · 1988
Released1988
ModelSega Master System
Colorblack
RegionNA
Rarityno data
Why
There’s no units produced with a source and not enough listings. We don’t make things up.How to tell them apart
Black angular 'Power Base' with red trim lines, 'Master System/Power Base' printed on the left, power and reset buttons, card slot at the front, hinged cartridge doors.
Details from sources
Tonka-distributed set; Hang-On built into the BIOS (ja.wikipedia BIOS table v3.4, 1987 USA).
Data source: segaretro.org
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