They month and year can be determined by the barrel code, all the details can be found on the Remington Society of America here:
http://remingtonsociety.com/rsa/questions/barrelcodes
Remington Model 552 Speedmaster
1914
The Remington Model 29 Pump Action shotgun was manufactured from 1930 to 1933. Approximately 38,000 produced.
Edward Searl has written: 'In memoriam' -- subject(s): Funeral service, Memorial service 'Coming of Age' 'In Praise of Animals'
I BELEIVE YOU HAVE A MODEL 241. IS THIS RIGHT??
1920
Manufactured 1927
Made in 1911
1927
Made 1912
Impossible to answer without the sn.
1920