There's also a 1972 Blackstone washer service manual on AutomaticE which has the details on all the models.
The buttons are 1) Regular/Permanent Press, 2) Soak with Spin, 3) Soak with Save, and 4) Water Saver.
Two timer cycles. Regular on the upper range, Permanent Press on the lower range. Button 1 applies to both cycles. 2, 3, and 4 apply only to Regular. Water Saver ends the cycle before the deep rinse, thus providing only spin-spray rinsing.
Someone years ago posted brochures for washer model BA-902. BA-902 is featured the same as BA-825 but the console layout is slightly different and not lighted. A close-up of the BA-902 console shows better detail.