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.
Yes
They should not be.
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.
Look on the barrel/receiver and it will tell you.
The markings on the receiver and barrel will tell.
It will be marked on the receiver/barrel.
Check the barrel and receiver.
Yes