Welcome prfoks
It isn't usually possible to get an exact production year for cymbals unless they have the year coded on them in the serial number. It also isn't always possible to tell the exact model when all traces of model ink have gone. But in this case I can point out a few things which narrow it down.
On current evidence serial numbers began in the second half of 1972, so that cymbal is older than mid 1972. The model is a Seven Sound Set #3 Bright Ride. Production on those probably started around 1964, so 1964 to mid 1972.
Here's why:
That cymbal has the fine tonal groove lathing (versus the coarse tonal groove lathing found on most 602s). The fine tonal groove lathing was used on Sound Edge hats and Flat Rides in the main 602 line. Fine tonal groove lathing was used on the Seven Sound Set series, and on the Joe Morello series.
The 17" diameter means that is a Joe Morello crash or a Seven Sound Set #3 Bright Ride.
The weight confirms it is a Bright Ride. They run from 1750g to 1930g. The Joe Morello crashes are more like 1300g. The hammering is also characteristic of Bright Ride hammering and distinct from the main line 602 rides and crashes. So it is a Bright Ride from what I can see.
There are also 17" Medium Ride models which run from 1500g to 1600g, but that model (along with other main line 602 models like Thin and Medium) are ruled out by the combination of lathing and weight. There are also Concert models and Marching models. The few examples I've got for those all have coarse tonal groove lathing and I haven't seen a 17".
I don't have a well established first year of production for the Seven Sound Set series. They are said to be 1969 on this site:
http://www.nf-drums.com/paiste_fanpage_paiste_timeline.htm
but I'm not sure why that site uses that year. Hugo Pinksterboer (The Cymbal Book, p158) gives 1964. They appear in the 1972 Ludwig Catalog. Since the demise of the Paiste Only Wiki some of the well established information has been lost. Some of the others involved in picking up the pieces might know of ads or other catalogs which help with first year of production for the Seven Sound Set series. I'd go with 1964 for now.