Sticker from back of game. Clearly shows it's a Gakken game, they might
have released it themselves as King Arthur's Knight.
Lindy Prinz Eisenherz (19xx, LCD, Watch Batteries, Model# ?)
A.k.a. Prince Valiant, this is the German version of Lansay's Les Chevaliers de la Table Ronde (Knights of the Round Table). Both games are identical to Gakken's Moon Patrol game (they just basically switched out the LCD). (Also, note from the sticker below that Gakken might have released this game themselves as King Arthur's Knight.)
Sticker from back of game. Clearly shows it's a Gakken game, they might
have released it themselves as King Arthur's Knight.
Do I have this? Yes, loose.