to speed up: turn on and HOLD the SEC-YR display switch; turn on and HOLD the DATE switch. slide the rear switch left for each step faster. each slide is 16 secs/yr
to slow down: turn on and HOLD the SEC-YR display; turn on and HOLD the TIME display. slide the rear switch left for each step slower.
i have found that taking the s/s tops off and removing the sliders and using just the magnets to turn on the various displays is easier than trying to hold them. also the rear magnet same way.
the booklet i have calls the bar segment model the synchronar 2100.
peter