It all makes sense now. I unfortunately know the history of that board as I owned it at one point.
I can confirm that it is not V1.0 but 1.5. I originally purchased a 1.0 board (or so I thought) from Surugaya and was instead sent that board , which had a different serial number than the one they showed in the listing.
I returned the board and spent months fighting with FromJapan trying to get my money back as the board was held in customs for like 5 months. The gave me a bunch of bullshit about it being held in customs even though THEY refused to accept it back. I had to file claims with the post office to see what happened and they confirmed to me that FromJapan refused to pick it up. I confronted them with this evidence and then it "magically" arrived to them a few days later. They finally gave me my money back, but only in store credit aka From Japan points, which was a huge slap in the face since they were the ones that fucked up and didn't verify it properly.
They are suppose to guarantee their items visually on arrival, and it was definitely not the same item shown in the listing. So I don't know if Surugaya just fucked up and sent the wrong board or if they were trying to pull a fast one and see if anyone noticed, but it left a very sour taste in my mouth.
I wonder if the seller is someone affiliated with FromJapan and they just wanted to get rid of it and couldn't return it to Surugaya or whatever? I really have no idea, but I do know the board works and is version 1.5.
TL;DR - That board is in fact a 1.5, not 1.0