Virtually impossible to answer with just a patent date.
100-1000 USD depending on EXACTLY what you have, condition, originality of all parts, box, papers, history, etc..
237571 is stamped on metal frame between the pistol grips
25 giga watts of power you dolt.
around 1900, on the age. Value is decided by condition,markings,and history of the gun. Need a better description, also. 6 inch barrel in good to excellent condition and has been in family for 3 generations.
We need make, model, condition. You gave us make. Need more information.
The value of a Colt Pt Fa Mfg co Hartford Conn US Pat d Aug 5 1884 June 5 1900 APR 9 01 July 4 firearm can vary significantly depending on its condition, rarity, and historical significance. This specific patent date range corresponds to the Colt Model 1900 semi-automatic pistol, which was an innovative design for its time. To determine the exact value, it is recommended to consult with firearms experts or appraisers who specialize in antique firearms.
your Colt was made in 1880 in caliber 44. check Gunbroker.com under Colt single action for condition and prices
Sorry- not possible to answer with only that information. Aug 1913 is likely a patent date. Please repost your question listing ALL markings, and describe the gun- rifle, shotgun, handgun, caliber, etc.
Pat Donahue was born on 1884-11-08.
Pat Callaghan debuted on May 1, 1884 and played his final game on July 31, 1884.
Pat Carroll debuted on May 10, 1884 and played his final game on August 7, 1884.
your revolver was made during the middle 1920s. last serial # were around 540,000. the barrel should be marked "Colt Army Special" Probably made after 1923 if wooden grips. Between $200 and $800 depending on condition according to 2010 BLUE BOOK of GUN VALUES page 576.