Those attachments in the first post are for a Eureka from the late 1950's - probably 1957.
It seems that Eureka went through a series of colour schemes in the 1950's and 60's. They started with a red and grey design, then went to a light yellow and grey. For the 50th golden anniversary in 1957, Eureka Williams vacs were all green and gold - which is where this set of attachments must be from. By the time I was born in 1959, their vacs were Lagoon Blue and white with silver trim. The blue scheme lasted for quite some time until around 1967 when more subtle beiges and cream colours were featured. By 1970, we began to see canisters and stick vacs in Avocado Green with simulated wood grain and beige accents and attachments.
It was not until 1973 that Eureka started selling vacs in a rainbow of different colours at the same time (burnt orange, Harvest Gold, cherry red, cafe au lait, Lagoon Blue, chocolate brown) like Hoover.