Can anyone identify this?

Obviously I can tell it's Benrus, I purchased this for a few dollars and I was going to try to do my first service on this. I was trying to pick out a cheap watch to practice on, do you foresee any issues or have any advice?

On a side note, I don't think there's radium but I'd rather someone more experienced tell me that.

TIA

https://preview.redd.it/u6y35akklhng1.png?width=730&format=png&auto=webp&s=713a12be42a065fe0d1c763b64f58b32e9095d62