The value of a High Standard Sentinel Deluxe Model R-107 nickel-plated revolver can vary depending on its condition, rarity, and current market demand. Generally, they can range from $300 to $600 in good condition.
50-150 USD
It's worth whatever you buy or sell it for.
GunParts catalog lists that particular model as being produced by High Standard, but the exact model is unknown, but I suspect it may be a High Standard Supermatic deluxe (if it is an automatic) or a flight King model (if it is a pump). High Standard yes, but specifically a J.C. Higgins Model 10 ... http://www.histandard.info/manuals/sears/bashotguns/index.html
20-125 USD or so
NO!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Do not shoot steel shot in this weapon.
It will be marked on the barrel.
Not usually. The standard Model 1905 was made with plain non-checkered walnut stocks. There were a scant few Deluxe guns made that have high quality walnut stocks that were checkered. Bert H.
25-135 USD or so
10-150 usd
High Standard
You will have to contact Browning to find out. If you are referring to the run of Browning model 71's that were made between the mid to late 80's and early 90's, there were a total of 14,000 made. 4,000 Standard Rifles with a 24 inch barrel. 4,000 Standard Carbines with a 20 inch barrel. 3,000 High Grade (Deluxe) Rifles with a 24 inch barrel. 3,000 High Grade (Deluxe) Carbines with a 20 inch barrel.