A purple V1, back when they were just blobs until the teenager stage. Ah, good times.
I gave it to my brother though, because he wanted one and didn't have enough money to buy a new one. Sadly, it died today because he left it within reach of my baby brother and he grabbed it and somehow got drool inside it.
The first Tamagotchi I ever had was the Green Matrix V1. Though I do have ancestor Tamagotchi's, they were added to my collection a little bit after I got the V1. I have all versions after the V1, including a TMGC+C and hopefully I can get an ID soon. I also have a P1 and P2, and a yellow Tamagotchi Angel.