Sharp EL-5510/PC-1421 manual or reference

[Dave Britten]

Does anybody happen to have any sort of manual or function reference for the EL-5510 or PC-1421? I finally tracked down an EL-5510, and it seems to work like most any other Sharp pocket computer of the era, but I could use a little more info on some of the financial functions.

For example, I've worked out how to do TVM calculations, and also days-between-dates, but I'm not sure if there's any way to calculate a past/future date a given number of days before/after another date, or to determine the day of the week for a date. I'll need to be able to do that if this is going to dethrone the Casio FC-200 as my favorite financial calculator.