TD7800-401 Fig. 4/pos.19 Fig. 4/pos.12 Fig. 4/pos.17 Fig. 4/pos.15 12495-1 TD7800-415 19513-11I 19549-1E, Model 4500A Old 80431 New 80531 Old 80451 New 80551 16252 81442 81452 10282 80531