Just looked at my japanese Virtual Boy and it also says Playlink.
V10113156

The manual illustrates an EXT Port.

I’m new in the FlashBoy “Family” and didn’t know i had to pad the roms. This explains a lot. >.< Thank you very much, every rom works now. ^^

I contacted Richard and he’s not producing any FlashBoys at the moment. He will contact me, when he’s starting to build some carts. 😉

My first virtualboy:
V10113156