Both of your guns are Colt New Army & Navy revolvers.
One is a US Army issue, the other is a commercial sales model.
Here's some info from an article I wrote:
In 1889 Colt introduced the world's first double action, swing-out cylinder revolver. This design was so revolutionary that every double action revolver designed since used Colt's swing-out cylinder design.
The US Navy immediately bought the gun as the US Navy Model of 1889, and in 1892 the US Army also bought it in a slightly upgraded model as the US Army Model of 1892.
Colt also sold the gun as a commercial sales model, and it was immediately a popular gun with the public.
Colt put the new gun through a rapid series of design upgrades with each change getting a new model number.
These were the Models 1889, 1892, 1894, 1895, 1896, 1901 and the 1903.
Production stopped in 1907.
Serial numbers on the military and commercial models were stamped on the butt in two lines, with military models having US Army or US Navy stamps on the butt and military inspection stamps on the frame.
Other parts of the guns were stamped with factory assembly numbers. These numbers were stamped on parts during manufacture to keep fitted parts together until an actual serial number was assigned and stamped on the butt.
These assembly numbers are not serial numbers and had no further meaning once the serial number was stamped.
Finish on the military models was blue with smooth walnut grips.
Barrel length was 6 inches, and the caliber was the .38 Long Colt.
The commercial models were available in blue and bright nickel with black, hard rubber grips with molded in checkering and Colt logo.
Barrel lengths offered were 3', 4 1/2', and 6'.
Calibers were .38 Long Colt, .41 Long Colt, and very late in production in .32-20 and .38 Special.
The Model 1889 originally had no locking notches on the outside of the cylinder, using the hand that advanced the cylinder to lock it in place during ignition.
This system was a major weakness in the design, since when the action was at rest, the cylinder was free to rotate. This could cause the cylinder to rotate so a fired cartridge was struck when the trigger was pulled instead of a live cartridge.
This was corrected by rebuilding almost all US Navy issue guns to use the same double cylinder locking notches on the outside of the cylinder that were used on the upgraded Model 1892.
Commercial Model 1889 revolvers were not recalled for the upgrade, so these guns are recognized by the lack of locking notches on the cylinder.
In the 1890's the US Army was fighting a guerrilla war in the Philippines against radical Muslim Moro fighters.
These warriors would use drugs and religious fanaticism to put themselves into a berserker frenzy that allowed them to absorb bullets and continue to attack until loss of blood finally brought them down.
Unfortunately, these failures to stop them with the low power .38 Long Colt allowed them to attack and kill US personnel even though they had sustained fatal wounds.
When cases of multiple soldiers emptying New Army revolvers loaded with .38 Long Colt bullets into rampaging Moros only to be hacked down, the Army realized they had to do something.
With the situation critical, the Army quickly removed obsolete Colt Single Action Army revolvers from storage in arsenals. These guns were refurbished, the barrels were shortened from 7 1/2' to 5 1/2' and rushed to the Philippines to replace the ineffective New Army in .38 Colt Long.
The Army realized that the .38 caliber was not an effective military cartridge so a search was started for a heavier caliber handgun to replace it was begun.
Ultimately the US government would adopt the Colt .45 Automatic, Model of 1911 as the new service pistol.
Here's info on your particular guns.
The US Army issue gun number 140811 was made in 1900, and would be a Model 1896 revolver.
The commercial Model 1889 Navy type was made in 1893.
NOTE: These two guns are chambered in the original .38 Long Colt. This IS NOT the .38 Special, and while the .38 Special will chamber and fire, it may not be safe to do so.
The .38 Long Colt was a low pressure round loaded with black powder or to black powder pressures.
Only the very last commercial Colt New Army model revolvers made in the last few years of production were chambered for the .38 Special and had barrels sized for the smaller .38 Special bullet.
If you want to shoot these, either buy Cowboy loads of the original .38 Long Colt, or custom load VERY light loads using .38 Special brass. Note that the .38 Long Colt bullet is larger then the .38 Special, so accuracy may not be good.
Note also, that these are very complex, intricate actions that break and get out of order easily. If broken, there are few usable parts and almost no gunsmith will even consider attempting repairs.
Treat them gently.
Value:
Value depends on the guns being in working order and is based on the amount of remaining original finish. Grips must be original, and the hard rubber commercial grips must be unbroken.
The US Army Model 1896 values run as follows:
10%--$175
20%--$195
30%--$225
40%--$250
50%--$275
60%--$300
70%--$400
80%--$500
90%--$700
95%--$1,150
98%--$1,650
The Commercial 1889 New Navy values are as follows:
10%--$300
20%--$350
30%--$425
40%--$500
50%--$600
60%--$700
70%--$850
80%--$1,050
90%--$1,350
95%--$1,550
98%--$1,850