Malcolm -
There were more models from 1973-1980 with the gold Penta-Vanes than the 1981-1986 production white versions. The Penta-Swirl went to white in 1976 and was very widely produced. I think for some time Kenmore kept the gold as a reminder on the sales floor that you were looking at a lower line machine. The 'Vane models in white were 1981, 1982, and 1984 models:
81 - a 200 (the one pictured above), 2 500s (including one very bizarre model which I've never seen), and a well appointed 60 series.
82 - a 100, a 300, another 500, and two more 60s that replaced the 81 60-series.
83 - no models came out in the large 1983 line which used the Penta-Vane, in fact the 29-inch 1983 60 had a DA.
84 - two 400 models for Toyota, and one 70-series model, also for Toyota.
By my count that's 12 models. Other than the Toyota models, these were all out of production by early 1984, that's why they aren't all that common. The 100, 200, 300, and 500 series machines were all 'plastic top' plastic control panel models. The 60s were the entry level black panel machines, and the Toyota models had the revised printing on the black panel consoles, which have been discussed in other threads.
Gordon