Micro ][ BASE-48
Rudi Greth found this Micro ][ on eBay Germany in an auction with a German floppy disk built by Siemens and a Philips monitor (Type TP200). The computer's case says Micro ][, but the manual identifies the computer as the "BASE-48". The manual is written in English, indicating that the computer is probably not of German origin.
The user's manual also describes a machine named "BASE-64A". It is obviously written for both models: the BASE 48 and the BASE 64A. There is a sticker on the cover with a "48" on it (perhaps the "64A" is under the sticker). The end of the manual holds the CKT and component location diagrams of the models. (Click to enlarge.)