Blue Book of Gun Values is one place.
where can i find orginal grips for a cot bisley
value is based on overall condition..............
depends on conditon
about 1913
You will need a professional appraisal and contact Colt to get a historical letter.
about 1905
That Colt frontier Bisley with sn 282698 was produced in 1906.
10-10000 USD depending on specifics.
Based on proofhouse.com ,that bisley was made in 1913.
Lacking any more specific information, 100-1000 USD or more
Try Proofhouse.com
1897. IMO, worth spending the money to get it lettered by Colt