Dryer.
That is an earlier machine of the later center-dial era. This washer looks to date from 1966-1974, note the blue strip instead of the later gold at the bottom of the control panel and the white dial face instead of brushed aluminum. The model number of the washer likely goes something like A?06.
You would be looking for a Halo of Heat dryer. These dryers have model numbers that look like D??06. D = Dryer, E = Electric, G = Gas, number = which control system / features, and 06 = Halo of Heat. A letter in front of the above-referenced model umbers indicates a color other than white. H = Harvest Gold, K= Avocado, etc.
I'll assume you'll find an electric dryer, which would start with DE. If you look for a gas dryer, it would start with DG, and have a small burner access door on the front.
Available models are as follows (I think this is accurate).
DE/DG106 = BOL. This is as basic as it gets. Watch out, however, there is a newer version of this one made from 1975-1980 that has the lint filter in front and uses the newer style guts.
DE/DG306 = Average. This timed cycle-only dryer offers regular, perminant press, and air fluff.
DE/DG606 = MOL. This dryer offers electronic controlled sensor-based drying. Set the dial for what you are drying and the dryer takes care of the rest. This is the highest you can go and have it match your washer.
DE/DG806 = TOL. Same as the DE/DG606, but with a backlit control panel and a drum light.
DE/DG906 = Super-TOL. These are rare as hens teeth. They are ther same as the DE/DG806, but with the cycle selection as a row of buttons instead of a dial.