The 72g refers to the year it was made, 1972, and the G indicates the lightweight model. The non special edition guns value around $600 in good or better shape and the special edition ones can add $200 to $300 to the value depending on the options it has.
Special order is possible.
Can still be special ordered.
They will still do special orders.
50- 600 usd
In your question, you answer your question.
You will have to call Browning to find out.
A few thousand if NIB.
You have listed a proofing mark on the gun, not the serial number. Look for the serial number on the bottom of the receiver, and ask your question again with more detail.
They haven't. Special orders are still an option.
Special orders are still being made.
100-1000 USD or more depending on specifics.
Your browning 16ga was produced by browning in belguim in 1949.