POLAROID SX-70, Sonar, 680, Repair, 600 conversion and SX-70R Bluetooth pcb upgrade. The SX-70R is a new Bluetooth pcb which replaces the old pcb in your Polaroid SX-70, Sonar or 680. - Auto or manual mode with a shutter speed from 25s - 1/8000s (equivalent).
eBay