It's a cracking beer but looking at the label I felt an irresistible urge to start rubbing my chin. "Using 7 malts to create a historic recipe from 1750" it says. Now I know enough about beer history to know that doesn't sound right. Surely early Porters were made entirely from brown malt?
So I had a look at what Ron has to say on the matter and sure enough it's all there: the first porters were brewed from 100% brown malt but use of the hydrometer in 1770 showed that pale malt was much more efficient and lead to changes.
The black colour of the beer suggests to me that one of the malts is black malt, which was first produced in 1817, and the caramel flavour suggests crystal malt. Now I don't know when crystal malt dates from but I think it only became popular in the 20th century so it looks out of place to me in a 1750 recipe. Fortunately for me my taste buds aren't interested in beer history so they didn't make any fuss and just got on with enjoying the beer.