Hi mosen,

No, I did not build it myself. I have been planning to build one but never got past gathering the parts. That is my MO: get excited about something, buy the parts, then lose enthusiasm

I bought this one on eBay, from Ukraine. Have been thinking about it for a few years and when the war broke out, I though, "Why not? I will support someone in Ukraine and if by any miracle it arrives, it will be an added bonus." I even made a nice strap in matching colours

It displays time by pressing the button. First hours, then minutes. Otherwise it is dark all the time. Constantly on would drain the battery in less than an hour. This way it lasts about a month.