Time for another small update. About a month ago I won a few auctions on a danish auction site for something called a Smartcom which looked like something made by Datel.
A while back I collected all of Datels (Rocket Games') GBC releases and this Smartcom cartridge was indeed a Datel cart that I had never heard of or seen before...
Check it out here
... I wonder if I have a full set now? :-)