What 'Test' key are you talking about? The key at the top reads 'RESET'.
This looks like a (rather shoddy) aftermarket ADB keyboard to me. The 'Closed Apple' logo is curious, but the key layout is far from anything Apple has produced. The 'ribbed' area separating the keyboard and keypad is the only nod to the actual GS keyboard. Hardly lawsuit material, particularly in Italy, where the IIgs keyboard shown below it was sold (note the QZERTY layout).
This looks like a (rather shoddy) aftermarket ADB keyboard to me. The 'Closed Apple' logo is curious, but the key layout is far from anything Apple has produced. The 'ribbed' area separating the keyboard and keypad is the only nod to the actual GS keyboard. Hardly lawsuit material, particularly in Italy, where the IIgs keyboard shown below it was sold (note the QZERTY layout).