"The Berkshire" by Meridan Firearms
"Berkshire No. 3000" by Crescent Firearms
Contrary to popular belief, not the same company.
This would be an early H&R shotgun from 1905-1940, or thereabouts. The 36" barrel makes it more interesting.
Browning makes a bps pump model in 3 different barrel lengths and also found a tristar o/u.
You need to identify the make and model of the shotgun. Dozens of different makes of guns show a browning patent on the barrel. Recheck and re-ask the question - Thank you
Sears is known to have used that as a tradename, but they never manufactured anything. Ithaca used it as a tradename, but not on doubles. There are other markings on the gun which might be helpful. www.countrygunsmith.net
Surely there are more markings on the gun. I can find a similar number on a Western Field (Montgomery Wards) double barrel shotgun which makes me suspect that it is Stevens/Savage 311 re-branded for Wards. This model designation was used after 1948.
To shoot the double shot, you have to cock it enough so it clicks and makes an L shape. Then put the darts into the orange shells and put them into the two holes at the corner of the L. Then you can fire two darts at once. then press that button at the top/middle of the gun and bend it. The shells will pop out. To shoot again, repeat the cycle.
Rumor is it's RCA
According to Nebraska FurnitureMart these are made by RCA.
The Western Field shotgun was sold by Montgomery Ward and made by Mossberg. Made around 1964. I inherited one that is in mint condition and still fires. It is a 410 single barrel 150c shotgun.
A Winchester 12 gauge model 1200 pump shotgun holds 2 in the tube and 1 in the barrel. So it holds 2+1 which makes 3 total.
Currently, no on that I am aware of.