Answer 1
According to Pierce's Piano Atlas Baldwin pianos have no more than 6 digit serial numbers so maybe the poster has not got the right number. Some pianos have more than one number, but only one is the serial number.
Answer 2
Looks like it was produced around 1987. Baldwin uprights after the mid 1970s have 7 digit serial numbers.
This piano would have been built sometime in the first half of 1972. That year, Baldwin pianos had serials beginning at 953937 on through 979129, which marked the start of the 1973 production year.
http://www.bluebookofpianos.com/serial1.htm This site will give you the answer
I have a Baldwin 621 piano with a different serial number and it was bought in 1988.
Go to this website for a free listing of piano ages by serial numbers: http://www.bluebookofpianos.com/serial1.htm According to their list, your piano was made between 1966 - 1973.
Usually, a piano has the year it was made on the inside of the lid.
1924 - confirmed in Piano 'Blue Book'
As of November 2013, the age of a Baldwin piano with serial number 246905 would be 32 years old.
According to my copy of the Pierce Piano Atlas, the Baldwin piano with serial number 127398 was manufactured in 1954.
1980
1986
According to bluebookofpianos.com, an Acrosonic piano with this serial number would have been manufactured in 1964.
As of November 2013, the age of a Baldwin piano with serial number 246905 would be 32 years old.
How old is this piano with serial number 1510355
This serial number is not available. I have 278556 ultrasonic Baldwin piano is in 1988.
According to my copy of the Pierce Piano Atlas, the Baldwin piano with serial number 127398 was manufactured in 1954.
1980
1986
207 years
Very old about 209 years old
According to bluebookofpianos.com, an Acrosonic piano with this serial number would have been manufactured in 1964.
Baldwin started manufacturing in 1959 at serial number 655948 and then 1960 at serial number 679844. In that case, the serial number 673394 would belong to a Baldwin piano produced some time in the second half of 1959.
464712
I may be able to help with the age. I have a Baldwin Serial number 1324731, Style 2015C. It is a Baldwin console, oak wood, deluxe 88 note piano purchased in April of 1983 for approx. $2,900.00. At the time of purchase I was living in Gillette, Wyoming and had purchased it from Weber Piano & Organ Company.