Apple helpfully marked the xtals with their own p/n, 197-0001. Does anyone happen to know what Pico-Farad rating is correct for buying replacements? 18pF?
Are there any other ratings that fall into a narrow range that I need to stay within? I'd like to order a reasonable supply, rather than one piece, to have on hand, and I'd rather not experiment with tolerances.
Looking at http://www.willegal.net/appleii/appleii-components.htm, the system is extremely selective in what will work properly.