HOW OLD IS MY PIANO?

FREE PIANO IDENTIFICATION & SERIAL NUMBER LOOKUP TOOL

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

DIRECT ANSWER

Most Acrosonic pianos can be dated to a specific year using their serial number. This is because they follow Baldwin’s centralized production numbering system rather than multiple overlapping systems.

However, results can still vary slightly depending on:

production era (pre-war, post-war, and late production periods)
manufacturing location (primarily Cincinnati, later Arkansas facilities)
late-stage production under Baldwin ownership changes

In general, Acrosonic pianos are more straightforward to date than many other brands.

SERIAL NUMBER LOCATION

Open the top lid or front panel and look inside the piano.

The serial number is stamped directly onto the plate, or onto the wood, visible through a cutout in the cast iron plate, near the tuning pins.

On many Acrosonic spinets:

the lid is held shut with spring clips
it may require firm upward pressure to open
press down firmly to snap it closed again

HOW ACROSONIC SERIAL NUMBERS WORK

Model identification must be confirmed separately from the serial number.

your serial number directly maps to a production year
it does NOT identify the model by itself

WHAT YEAR IS MY ACROSONIC PIANO? (WHAT TO EXPECT)

After entering your serial number, you can typically determine:

the exact year your Acrosonic piano was made
its production era
its position within Baldwin’s manufacturing timeline

However, the serial number will not tell you:

the exact day or month of production
the specific model (spinet vs console)
detailed factory origin in all cases

ACROSONIC PIANO SERIAL NUMBER LOOKUP

Use the tool below to estimate your Baldwin Acrosonic piano’s age.

STEP 1: SELECT THE MANUFACTURER

Important note for Acrosonic pianos:

Select “Acrosonic” (not Baldwin)
Acrosonic is listed separately in the database

Manufacturer

STEP 2: ENTER YOUR SERIAL NUMBER

Serial Number

STEP 3: THE RESULT

COMMON ACROSONIC SERIAL NUMBER MISTAKES

When looking up your Acrosonic piano’s age, common errors include:

confusing “Acrosonic” (model name) with the serial number
entering a patent number or cabinet number instead of the serial
misreading digits due to lighting or wear
assuming the serial applies only to Acrosonic production
choosing “Baldwin” in the drop-down menu

If your result seems incorrect, re-check the number on the metal plate inside the piano.

ACROSONIC PIANO HISTORY

The Acrosonic name was introduced in 1935 by the Baldwin Piano Company.

It became one of the most widely recognized American piano lines, especially during the mid-20th century when spinet pianos were in high demand.

Most Acrosonic pianos were built as compact vertical instruments, but were engineered to outperform typical spinets through:

Baldwin’s “Full Blow” action design
higher string tension scaling
more robust internal construction

Production began in Cincinnati, Ohio, and later expanded to Arkansas as Baldwin scaled manufacturing.

Acrosonic