I have a Seneca Green Nylon 66 with a date stamp for February 1960 and a "Made in Canada" stamp on top of the barrel ahead of the rear sight. Hope this helps.
it looks like in the blue book that the mod.# is nylon 66
There is a video on how to assemble and disassemble a nylon 66 on youtube.com
Remington.
Purple wasn't a Remington color.
The Nylon 66 is a rifle that was made by Remington from 1959 to 1989. The brown and chrome model was Nylon 66MB and over 700,000 were produced.
1959 to 1989
Go to Remington's web site. They have a list of repair centers.
Check the service and parts link on the Remington Society of America here: http://remingtonsociety.com/rsa/service
The last year of production for the Remington model nylon model 66 was 1990.These rifles were made from 1959-1990 with a total production of 1,050,336.
http://remingtonsociety.com/rsa/questions/barrelcodes
You can but the receiver flexes and it is difficult for the scope to stay in adjustment.