The SCSW that I happen to have is a second edition, and the current version of this fine book is the Third Edition. So there may be some updates where mine has left off. I say this because the chart in the back of the book that usually tells the tale doesn't list any N-prefix serial numbers after N932xxx, showing that as 1983 production date.
However, the meat of the book and the accompanying Model 629 text notes that the 629-1 was produced from 1982 to 1988.
I think it's safe to "estimate" that your revolver dates to 83-85 or thereabouts.
Value is horribly subjective and will be affected by odd/interesting factory features, but centers mostly around condition, condition, condition. Also keep in mind that a "price" range can vary from the ultra-low (what a gun store would give you) to absurdly high (what a small town gun store might actually display on the 'for sale' tag to open discussion) and anywhere in between. To further muddy up the process of determining a "value", keep in mind that some guns are simply more sought after in certain areas more so than others.
It might be helpful to simply say that a 629-1, while a fine revolver, isn't particularly rare and/or doesn't typically carry some radical premium. I would expect to pay $600 to $700 to get a 629-1 in decent shape in the circles I travel.