http://remingtonsociety.com/rsa/questions/barrelcodes
The Remington nylon 10s were made (1962-1964) before serial numbers were required (1968)and I think all of them were made without a SN.
No
Purple wasn't a Remington color.
it looks like in the blue book that the mod.# is nylon 66
value of your Remington nylon 11 is from $500-700, there is one for sale on guns America now listed for $660.
Remington.
75.00
They month and year can be determined by the barrel code, all the details can be found on the Remington Society of America here: http://remingtonsociety.com/rsa/questions/barrelcodes (will be between 59 and 89)
There is a video on how to assemble and disassemble a nylon 66 on youtube.com
I own a Remington Nylon 66 BD and it's in perfect condition the current price for it is $820.00. It does depend on the condition of the gun and the model of the Remington 66. I have seen the same rifle models go for $610, but they were in fair condition. In 1967-1968 the serial numbers were located in the bottom of the barrel 3" back from the muzzle and should be 19012-473710. The lower serial numbers were made in 1967 and the higher serial numbers where made in 1968. If you not sure which model of Remington Nylon 66 you have check out wikipedia and you should find your answer there or find a local gun expert.
Remington didn't make a model 55 rifle, nylon or otherwise. Autoloader, lever, or Bolt, Clip or Tub, letters on left side of barrel?
Depending on condition, about $170-$250 (for an excellent specimen) There is a fair collector interest in the Remington Nylon rifles, although the semi-autos get the most attention.