JP Sauer made some very fine guns, and it would be impossible to accurate evaluate without seeing it. Could be into the thousands.
Vacuum is generated by using Ejectors. 1. steam jet ejectors 2. water jet ejectors. may be single, double or 3 effect.
Impossible to answer without a lot more information. Need to know grade, condition, etc.
Since Winchester made only 2 double barrel guns, the Model 21 and the Model 24, yours is one or the other. If you look carefully, you will see the model number. Because it has auto ejectors, it seems reasonable that you may in fact have a model 21. If so, it is very valuable. A beat-up, abused 21 that still shoots is worth at least $3000. One that is in good condition will bring more than $6000 in 12 ga., double that in 20 ga., and up to $25000 in 410.
A common Parker Bros. hammerless double, D grade, good to very good condition, 12 ga. with ejectors, with a modicom of case colors remaining, is worth in excess of 500 dollars US.
Your Remington model 1900 double barrel shotgun was made from 1900-1910.There were only 98,475 shotguns made during this time frame and will be in the 300,000 block serial number range.A shotgun without ejectors will bring between 200-1,000 dollars for a shotgun showing between 10%-80% of it,s original finish on the wood and metal.A shotgun with ejectors will bring between 250-1,200 dollars for the same condition mentioned above.
Provide a detailed description of ALL markings, including under and on the forearm, barrel, barrel length, finish, automatic or non auto ejectors, sights, whether over/under or SxS, any accessories, etc..
In typical used condition (these guns were retailed by Montgomery Wards and generally used pretty hard) these guns will sell in the $300-$350 range. There are a couple of options that add some to the price, namely ejectors instead of extractors or a single trigger instead of double triggers. Mint-condition guns with ejectors and a single trigger might bring $600. sales@countrygunsmith.net
You have an Ithaca Flues model made in 1914 you did not mention condition, straight or pistol grip, beavertail or splinter forearm, ejectors or extractors steel or damasscuss barrels or the choke markings on the barrel flats. 500-3000
KBI is the importer. Is the Baikal an over&under or a side-by-side? Screw-in chokes or fixed? Extractors or ejectors? Chrome lined bores? Any engraving or inlaying?
Double Barrel Benefit was created in 2004.
Barrel, stock,
There is no need to start a double barrel. A double barrel shotgun needs to be loaded like you would a single barrel shotgun only using two bullets. You then cock the gun, aim, and fire.