On Mon, 16 Apr 2018 16:48:43 +0100, Jim.GM4DHJ ... another notorious,
troll-feeding idiot, blabbered:

Why would that have anything to do with the material they're made of?

just the way they were made back then ......very shallow seal

LOL! You REALLY want to know it, eh, poor sod? Just wait and see, you ****ed
up moron!