Sears & Rubbuck Model 200 12 ga ser # 273514010

Question
QUESTION: I would like to know the History and value?

ANSWER: Sears had 2 different model 200 from 2 different makers.
Sears 200 Winchester   1200 Pump Shotgun
Sears 200 Mossberg   G4 Bolt action shotgun
Which style do you have?
Reply via follow up.

---------- FOLLOW-UP ----------

QUESTION: Is the Pump Action different from the Bolt Action, if so  
then I have the Pump, if you have another way of telling
then help me out, I have listed the S/N, maybe this will help?

Mod       200
Ga        12
Chamber   2,3/4 Full
S/N       273514010

Now you have all the # I can find on the gun

Answer
If it looks pretty much like this then is pump.
http://id.wikipedia.org/wiki/Berkas:Winchester1200Def-2.jpg
It is house branded Winchester Model 1200.
The owners manual is here.
media.winchesterguns.com/pdf/om/model1200_om_s.pdf
These were made from 1964 to 1981.
They are worth $100 to $400 depending on condition.