You will have to call Browning.
1906
See the Browning website- customer service. Date of production by serial number listing.
Impossible to answer without a detailed description.
1968
What is the year of mfg. of FN pistol Model 1910, with serial number 583500
You will have to call Browning. The sn you list goes beyond published data.
You can access the date of manufacture of many Browning firearms at the Browning website, under Customer Service.
Exactly how is the pistol marked? 9mm browning serial number 72C44338
Blue Book of Gun Values
You must call Browning. SN does not follow normal convention.
Your Browning model nomad 22cal pistol was made in the year 1971.