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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.
WHERE IS THE SERIAL NUMBER ON AN ACROSONIC?
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
Important note for Acrosonic pianos:
- Select “Acrosonic” (not Baldwin)
- Acrosonic is listed separately in the database
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.
Our database includes all Acrosonic piano serial numbers and production years, covering spinets, consoles, and later vertical models.
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