The 5100 designation was used from 1931 to 1941.
The semi-circle shape can be the 1st or 3rd quarter. Perhaps you would want to double check, but I believe that if the "flat" side of the shape is facing to the left, that is the 1st quarter; to the right - 3rd quarter.
A five sided shape of the hexagon is used to represent and model a molecule of benzene. The hexagon will have alternating double lines (or a single double) to indicate the presence of its characteristic double (sp2) bond.
Double Helix :D
double replacement
Double insolated cases
I can say that the Stevens model 311 side by side shotgun was discontinued in 1989.I would go to the Savage arms web site,they may be able to help you find out when the manufacture of your shotgun was started.
$ 300-$500 if it is Police model with 18" Barrel, in good shape...I got one...
http://www.gunstocksinc.com/web_pages/Plate-pics/Stevens-stocks/225-235-descrip.htm
I also have a Stevens 311A Double Barrell, doubled triggered 12 gauge shotgun made by Savage Arms in very good condition and do not know the age or the value. My gun has a ribbed barrel, but the stock is not walnut. JT 1/19/08
Around $1000. in good condition.
Stevens savage model 311a double barrel shot gun with 28 inch barel
The Stevens model 311 was discontinued in the year 1989.You would have to contact Savage/Stevens to get the actual age of your double barrel shotgun.
the stevans/savage double barrel 503a was made between 1936 and 1954
That would be a Stevens/Savage 315 with a Montgomery Ward name.
there is a model 311a double barrel shotgun made by Stevens/savage but have not heard of just an 11a. I have a 20ga 311a given to me by my grandpa and he said it was made in the fifties. You can go to Google and type in Stevens model 311 and will pull up information on this shotgun.AnswerRemington made a model 11a but it was not a double barrel it was a semiauto.
STEVENS / SAVAGE HAVE A COLLECTORS SITE GOOGLE IT
No, they were discontinued in 2005. As a side note the 411 was not manufactured by Steven/Savage Arms, but rather Stevens/Savage Arms contracted with Baikal Arms of Russia to manufacturer the 411. Stevens will be introducing the replacement model for the 311 and 4111 in July of 2009, the MSRP is double what the 411 sold for, the MSRP is going to be $799.00