Old plans of St. Paul's Cathedral London. Not sure how old it is

This is a old plans of st Paul's Cathedral.
I'm not sure how old it is as this plan doesn't have a date on it.
going on the others plans I got with it there are dated over 200 years old. It's on tracing paper that has been put on a cloth like sheet, I believe it's a print that has added written plans, it's roughly 3ft by 2ft big
I think their came from a old London office planers that just throw them away.

I would like to find out how old this is if anyone could help that would be great.

There was hundreds of plans but I just got a few of them as I wasn't at the dump on that day but a friend knew I would like them and put some aside for me.
I've got one of London meat market and North side of the embankment The Thames river which is dated A.D. MDCCLXVII (1767) in the reign of King George the third. And some other ones.
Their are a great piece of London history