Hey, fellow New Yorker! You're up around the capital district, right? I'm down in the mid-Hudson valley region.
Crown Jewel rings a bell; I remember seeing a few of those on house racks in the late '70s. That would jibe with what you said about them being '60s vintage.
There's very little information out there about the Triple Crown. All I've turned up is a print ad from 1975, and a message board post where it was claimed that the Triple Crown had a wood core and hit like a [censored]. On the other hand, someone on Usenet had high scores with his, so "your mileage may vary", as they used to say.
The guy who sold me my
ball estimates that it's been sitting in his closet around 25 years. So the scant evidence I've found indicates a production timeframe of mid '70s through early '80s. Supposedly you can tell the production date from the serial number, but I haven't found a date code reference on the web. Perhaps I'll email
Brunswick, just for the heck of it.
Speaking of old bowling
balls, my girlfriend's father, hearing of my renewed interest in bowling, came to visit the other day and brought his old
ball to give to me. It's an
Ebonite Don Carter "Gyro Balanced." It's a 15# or 16#, plugged and drilled fingertip. He told me that he once bowled a 299 with it, when it was still drilled for conventional grip.