UK Hoover Serial Numbers

[1066hoovers]

Can someone remind me what the Hoover serial numbers meant in the 1970s. I know the model number is first, but how do you work out the month and year and what do the other numbers mean?
Also, when did this system of numbering start and finish?

 

[seamusuk]

An Example......

My U4002 Ranger is U400250805052

So thats U4002(Model)5(Year-you need to know the decade in this case its 1975 obviously)08(Month)05052(Number of individual machine).

This system ran for about 30 years from 1967-1996-7.

Seamus

 

[1066hoovers]

Thanks Seamus

It was the year which was confusing me. Wonder why they didnt use 2 digits for the year.