Contact Remington Customer Service thru their website.
Made by the Remigton Firearms Company.
The W ahead of the serial number indicates that your Remington 870 wingmaster was made in 1972.
Serial 718943w
They are all still made in Illion, New York, I believe.
100-350 USD
Do a search on barrel codes, I believe that will give you an answer
$2
To determine the age of a Remington 870 Wingmaster with serial number 1087826V, you can refer to Remington's serial number lookup charts. The "V" at the end indicates it was produced in 1971. Therefore, the shotgun is approximately 52 years old as of 2023.
Check this table for the answer: http://www.remingtonsociety.com/rsa/questions/barrelcodes
The 870 Wingmaster is still made in .410
It's date stamped see related links for info.
Depending on condition, the 870 Express is about $450, the 870 Wingmaster is about $725.