But looking closely I saw that the pcb part number was different from my DM-2 trio.
This one has a "large" Delay lettering, like the A and B version, but some components, like a socket to hold the chip, are more likely to be the earlier version, so it's either a late DM-2 or an early DM-2A.
And another variant was added to my collection...
![Sad :(](./images/smilies/icon_e_sad.gif)
It's in the mail, will arrive in 10 days, more or less.
Here are the pictures, they are all from the sellers I bought them from, and are in this order:
DM-2, DM-2 ? (the new one), DM-2A and DM-2B.
Edit: It's an A version, I found another one in Japan and I could see the A printed on the components side of the pcb, so it is an early version of the DM-2A.
Now we know that there are 4 versions, and not only 3, of the DM-2.
A small red arrow points to the different pcb part numbers, 2291045801, 2, 3 or 4.
![Image](https://i.postimg.cc/5NSGFzjy/Boss-DM-2.jpg)
![Image](https://i.postimg.cc/YC2PNSm3/Boss-DM-2-Aa.jpg)
![Image](https://i.postimg.cc/1tF7RnL9/Boss-DM-2-Ab.jpg)
![Image](https://i.postimg.cc/rySZv41j/Boss-DM-2-B.jpg)