Impossible to answer without a detailed description of all markings and condition
How old is my deutsche werke .25 cal pistol?cal.6.35m/m (on barrel) with stamp of N and a "symbol." ortgies' patent. deutsche werke aktiengesellschaft, werk erfurt (on left side of slide)N and a "symbol" (on right side of slide) matched same N and "symbol" (on right side of frame). (N and symbols match barrel).OH (inter-twined) metal stamp (on wood grips)Germany (on top of serial number underside of slide in front of triggerguard) 147, yes 147Thank you in advance for any help.
50-200 depending on specifics
How much is a old black powder only 45 cal long barrel pistol worth?
No published sn data
yes
I just bought one for $225.00 (12/14/07) in good condition (for an 85 year old pistol) with an after market magazine instead of the OEM. I have seen them on gun sale web sites for as much as $500. There are some tricks to disassemble and reassemble the pistol and to remove and install the handgrips. Damaged handgrips are a sign that the previous owner applied force instead of intelligence.
50-500 USD or so
Unknown.
Old gun catalogs and magazines.
Proofhouse.com has Colt sn data.
Try Old Western Scrounger
Impossible to answer without a detailed description.