WatchTech

" Working well and still quite presentable but has a variety of small to medium size scratches" Good Working Condition ORIGINAL PRE OWNED SEIKO BULLHEAD CHRONOGRAPH IN EXCELLENT WORKING CONDITION WITH ORIGINAL STAINLESS STEEL BAND IT HAS NORMAL SIGNS OF U

I have some old watches I'd like to take apart and play with. I'm looking for the kind of magnifier that has the wire to fit on ones head. Two questions: 1) Are there standard magnifying strengths (10x, etc.)? 2) Are there any particular brands I should l