No way to answer without a DETAILED description of ALL markings.
it was made about 1917, but value will depend on overall condition
$50-175, depending on condition.
I have almost the same revolver, you find out what is the value?
Not necessarily. Grips could have been replaced.
We need make, model, condition to answer. You gave us none of the 3 items we need- and we need all three.
25-500 usd
Grips made out of mother of pearl.
The value of ANY gun is based on the exact make, model, and condition. The Baby Hammerless was not a derringer, but a very tiny revolver with a folding trigger. The value of those revolvers runs about $200 for a working specimen in fair condition. Do NOT attempt to fire this with modern high speed 22 Shorts- it was made for black powder cartridges. Better condition can equal higher prices.
Grips not original. Requires professional appraisal
Can't be answered without a DETAILED description of ALL markings, barrel length, finish, grips, sights, box, accessories, papers, condition.
made around 1935. Value is decided by condition the gun is in, markings on the gun, and history of the particular gun.
Of course the value of a Colt Det. Special w/ pearl grips will be dependant on several variables. The condition of the pistol is of course key, also which series Det. Special the gun is; 1st, 2nd, 3rd or 4th. Finally, the finish of the revolver will also affect the value. EXAMPLE: A 3rd series Colt Detective Special, in MINT condition, NIB (new in box), and with a Nickel finish -- $1,000 Blued finish $800.00.