those are called the Wild Moss, Continental and were dated to right around 1975 or 1976, but there is a major problem with yours.....it is missing the original bag, that is what makes that model desirable. Here is mine which is all original. they were some of the last 3.5 amp Eureka uprights till the ESP (Extra Suction Power) was introduced in 1978. The bag that is on yours was to a mid 1980's model. in 1983 the Eureka logo changed from what is on my bag, and the top of the headlight cover, to the boxy logo that your bag sports....