It's hard to know for ABSOLUTE certain if this is the RV-60 (one oven with WONDER OVEN accessory) or the RV-70 with two genuine ovens. Both used the same control panel. It is certainly ONE of the two models that I listed, though. 1955 was the year that BOTH the "speed heat" left front burner AND the thermostatic "heat minder" right front burner were introduced on the Imperial models.