1-1/16″ Standard sized pinball which has been in use on all brands of pins from 1950’s to present.
The ball(s) should be changed if it has ever fallen out onto a concrete floor.
Likewise,if it has been allowed to hit a metal edge in the playfield for any length of time; due to a broken part, or missing rubber.
New pinballs come with a oily production film, BUT, these have been cleaned, and run through a tumbler / polisher for 4-days for a extra bright gleam.
A damaged pinball acts like sandpaper.
Data East / Sega / Stern: 260-5000-00