No way to answer without the serial number.
Proofhouse.com has Colt sn data.
1912
2006
1871
1910
Your serial number indicates that your Winchester model 1873 rifle was made in the year 1889.That year ended with serial number 323,956.
Your model designation doesn't make sense. It sounds like the caliber is .32 and the serial number is 20192. What is the model number?
60-100 yrs old
Early 1930s
No sn data published that goes down to the year.
No published sn data