Here is the owners manual and use/care guide to GE built-in ovens and cooktops from the early 1960's. Models include:
J820, J822, J824, J620, J630, J624, J634, J802, J902, J904, J900, J810, J812, J814, J880, J882, J884, J850, J852, J854
J710, J720, J750, J730, J780, J810, J820, J850, J880, J900, J620, J630, J712, J722, J752, J732, J782, J812, J822, J852, J882, J902, J624, J634, J714, J724, J754, J784, J802, J814, J824, J854, J884, J904