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What Year Was My Monarch Piano Made? (Serial Number Lookup + Guide)

DIRECT ANSWER

Most Monarch pianos can be dated approximately from the serial number stamped inside the piano, usually on the cast-iron plate near the tuning pins. The number can help place the instrument within a known Monarch production period.

The main complication is that Monarch was used by more than one piano maker. The known serial-number ranges generally do not significantly overlap, so they can be used as a combined dating system, but an exact year is not always possible—especially when the number is worn, incomplete, or confused with a player-mechanism number.

MONARCH SERIAL NUMBER LOOKUP TOOL

Monarch

WHERE IS THE SERIAL NUMBER ON A MONARCH?

Monarch serial numbers are typically found on the cast iron plate inside the piano.

MONARCH GRAND PIANOS

open the lid and inspect the cast iron plate
look near the tuning pins or along the plate edge
the serial number is usually stamped directly into the metal frame

MONARCH UPRIGHT PIANOS

open the top lid
inspect the cast iron plate inside the cabinet
the serial number is commonly located near the tuning pins
on some older uprights, the number may appear lower on the plate or along the wooden frame

Player pianos may also contain additional numbers on the player mechanism itself, but these are not the actual piano serial number.

DO NOT USE THESE NUMBERS

Patent dates
Cabinet or wooden-part numbers
Model names
Action assembly numbers
Numbers stamped on the player mechanism

WHAT A MONARCH SERIAL NUMBER CAN TELL YOU

A Monarch serial-number lookup can usually provide an approximate manufacturing year and identify the piano’s broader production era.

It cannot confirm the original owner, dealer, exact production day or month, cabinet options, or later rebuilding and restoration work.

MONARCH PIANO HISTORY

Monarch was an American piano name used primarily in the late 19th and early 20th centuries, when factories often built pianos under alternate names for retailers and distributors.

More than one manufacturer used the Monarch name.
Upright and player pianos were common during the brand’s known production periods.
Although the brand history is fragmented, the surviving Monarch serial-number ranges are distinct enough to be organized into a practical combined chronology.

Reviewed by Joe Kemple, Master Piano Technician, Burd and Sons Piano Service · Updated September 2026