Impossible to answer
was a 38-40 black powder
OK... and your questions is?
Your serial number indicates that your Winchester model 1873 rifle was made in the year 1889.That year ended with serial number 323,956.
Double check the serial numbers. No 1873 sn has a "b" at the end.
Go to this website: http://www.bbhc.org/firearms/records.cfm
Proofhouse.com
Requires appraisal. Could be 1000 - 10000 USD or more
It would depend on the magazine length, (full or half) and what caliber the gun was chambered for.
I can't get any serial number search on the 1873 to work if I put a letter in it. If the number is 336132, the gun was made in 1890.
The Winchester model 1873 rifle was chambered in 3 different calibers,plus at one time a .22cal rimfire.The 3 calibers are 32-20 Win(32WCF),38-40Win.(38WCF),and 44-40Win.(44WCF).If these markings do not appear on your rifle due to age and having been worn off,then a competent gunsmith will have to do a chamber casting to determine the correct caliber.If you are curious the serial number that you supplied indicates that your Winchester model 1873 was made in 1888.
Winchester produced 720,609 model 1873 rifles between the years 1873-1923.