I got these hats with a kit I purchased and I'm wondering what sort of playing they may have been designed for? They seem quite heavy - too heavy for me - at 1440gm and 1385gm and pretty loud too. Are they desireable?

I have a pair of 14" A's from the same period (purchased on this forum) but they are lighter and easier on the ears.

Also the stamp looks to be 1960's but I'm not sure. Can anyone confirm? The kit they came with dates to around 1970 and I'd say these came with the kit when new.