Model Variants (Master System)

there were several different game combinations built into the sega master system if you look at the model number on the bottom you can (maybe) tell which game is installed in the unit 2000 ? 3000 ? 3001 ? 3005 master system hang on / astro warrior 3005 03 a master system(e) bios 2 4 hang on / safari hunt (sms plus) \[11459a] 3005 03 b master system(e) bios ? ? alex kidd miracle world \[12808] 3005 05 a hang on & safari hunt (gun game) 3010 snail maze game (hold up and press a & b when starting the unit without a game inserted) 3010 a hang on & safari hunt (gun game) 3010 b hang on & astro warrior (i have found some b versions that only have hang on) 3010 c missile defense 3d (requires 3d glasses)