Production Num. of Grampain 26

I have a recently purchased a mint Grampain 26.
I have found a plate riveted to the entrance to the companionway with 181.
Does this number correspond with overall production of 980 26s or for a particular year.
I am trying to narrow down the year of this barn find that has no paperwork.
Thank you for your help in advance.

Hello. It’s a little hard to tell from your description. From what we can find, hull #181 was built around 1970. Any chance you have the HIN (hull ID number)?
Have you been to the Grampian Owners Site? Perhaps you can find someone to help there?