A Damascus twist steel double barrel shotgun is an antique shotgun made by layering iron and steel and welding them together. This kind of shotgun is worth approximately $3,000 depending on the condition of the weapon.
@ 100 USD depending on condition.
Go to www.bryndumlund.dk and find info on Christoph Funk Gewehrfabrik, Suhl, Germany
Long barreled shotgun
It depends on the year, manufacturer, and condition, but if it's a genuine antique and in good condition, you should be able to get at least $1,500 for it.
No, according to RCW 9.41.190: "It is unlawful for any person to manufacture, own, buy, sell, loan, furnish, transport, or have in possession or under control, any machine gun, short-barreled shotgun, or short-barreled rifle; or any part designed and intended solely and exclusively for use in a machine gun, short-barreled shotgun, or short-barreled rifle, or in converting a weapon into a machine gun, short-barreled shotgun, or short-barreled rifle; or to assemble or repair any machine gun, short-barreled shotgun, or short-barreled rifle." You can thank the assault weapons ban for this. There are exceptions though: http://apps.leg.wa.gov/RCW/default.aspx?cite=9.41.190
Impossible to answer without a detailed description of ALL markings.
The value of a London Fine Damascus 14 gauge double barrel shotgun marked JT Sang Ford depend on its condition. This gun in excellent condition is valued between 225.00 and 320.00 as of 2014.
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sawed-off double barreled 12 gauge Remington shotgun.