$100-$125.
gun parts corp has them on their website.
the shotgun takes a 2 3/4 shell
100-250 USD
Used, in good condition, a 349 Gamester model will not bring you more than $200. Probably about $150. Harrington and Richardson firearms are almost always very cheap. They work well enough, but you get what you pay for.
Harrington & Richardson did not make a Model 1900. Hopkins and Allen did.
Harrington & Richardson used the Prefix AT in 1983.
I purchased a new Harrington & Richardson 12 gauge model 088 from K-Mart in 1980.
Your harrington and richardson model 900 was made between the years 1962-1973.
25-100
10-110 usd
36GA