The side crimp of a Cornish Pasty helps distinguish it from other filled pastries

https://wiki-dale.win/index.php/Cornish_Pasties_by_Post:_The_Official_Story_of_the_Cornish_Pasty_88300

The side crimp of a Cornish Pasty helps distinguish it from other filled pastries and is one of the key features of the traditional version.