I like #s 2 & 3, but the SC in #1 makes it look like she's wearing her ring on the outside of a foil glove. I think if you go either full monochrome or full colour it would be a great shot.
The right hand in #3 is disconnected... it looks more to me like it belongs to a second person.
The first one, I'd have panned a bit to the left and made it more obvious it's a sewing machine as well as getting rid of the distracting background objects.