These are basically the clippers I have that have been used for over 25 years. There are probably some minor changes over the ones I have but they should be good and aren't too expensive either.

I bit the bullet and switched to the Wahl Senior back in May 2020 and it was a fantastic decision. I also picked up a cheap T liner off Amazon too since it doesn’t have to do much heavy lifting and the Senior can’t get those crisp lines