Prior to WWII all barrels and receivers should match. The practice stopped as absolute in the late 40's to around 1951 or 52. It is not necessary for them to match to be original as sold, however there are many cases where a barrel did match a gun as late as the 60's. This does not affect the value or collectability of the gun after the 1940's if it doesnt have matching numbers.
They should not be.
Yes
Check the barrel and receiver.
Serial number on a Citori is under the breakdown lever on the receiver. It should also be stamped on the barrel where it locks up on the receiver.
Check the receiver and barrel
Located on the barrel or receiver.
Check the barrel and receiver.
The markings on the receiver and barrel will tell.
Check the barrel and receiver.
Look on the barrel/receiver and it will tell you.
It will be marked on the receiver/barrel.
To determine when your Browning slug barrel was made, you can check for a serial number, which is typically located on the barrel or receiver. You can then contact Browning customer service or visit their official website, where they may provide information on how to interpret the serial numbers. Additionally, referring to Browning's manufacturing date charts or forums dedicated to Browning firearms can help you pinpoint the production date.