It was manufactured in 1909, the date should be on the top of the barrel just short of the front sight if the barrel hasn't been changed. I will include a list of serial numbers for the two major manufacturers.

SPRINGFIELD ARMORY PRODUCTION OF MODEL 1903 [Dated by calendar year: January - December]

1903‑1‑16000

1904‑16001‑67000

1905‑67001‑119000

1906‑119001‑269450

1907‑269451‑337861

1908‑337862‑358084

1909‑358085‑398275

1910‑398276‑456375

1911‑456376‑502045

1912‑502046‑531520

1913‑531521‑570560

1914‑570561‑595600

1915‑595601‑620120

1916‑620121‑632825

1917‑632826‑761757

1918‑761758‑1055091

1919‑1055092‑1162500

1920‑1162501‑1211299

1921‑1211300‑1239640

1922‑1239641‑1252386

1923‑1252387‑1261486

1924‑1261487‑1267100

1925‑1267101‑1270300

1926‑1270301‑1274764

1927‑1274765‑1285265

1928‑1285266‑1305900

1929‑1305901‑1338405

1930‑1338406‑1369760

1931‑1369761‑1404025

1932‑1404026‑1425933

1933‑1425934‑1441811

1934‑1441812‑1491531

1935‑1491532‑1496022

1936‑PRODUCTION TEMPORARILY SUSPENDED

1937‑1496023‑1510387

1938‑1939‑1510388‑1532878

Total: 1340000.

Introduction of improved heat treatment at SN800000

Introduction of nickel steel at SN1275767.

¨RIA PRODUCTION OF MODEL 1903

1903‑1‑7500

1904‑7501‑16000

1905‑16001‑28000

1906‑28001‑75000

1907‑75001‑130000

1908‑130001‑165000

1909‑165001‑178000

1910‑178001‑201000

1911‑201001‑210634

1912‑210635‑217801

1913‑217802‑234830

1914‑PRODUCTION TEMPORARILY SUSPENDED

1915‑PRODUCTION TEMPORARILY SUSPENDED

1916‑PRODUCTION TEMPORARILY SUSPENDED

1917‑234831‑257061

1918‑257062‑326935

1919‑326936‑348414

TOTAL: 346000

Introduction of improved heat treatment at SN285507.

Introduction of nickel steel at SN319921.

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