Eastman Serial Number Lookup: Free Instant Decoder

What's Next?

Now that you've decoded your Eastman guitar, here are the best places to continue:

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Eastman Serial Number Lookup: Decode Your Guitar Instantly

Eastman has earned a reputation as one of the most respected boutique-style guitar makers out of China, offering hand-voiced acoustics, vintage-inspired electrics, and beautifully carved archtops at surprisingly fair prices. Whether you own an AC series acoustic, a T series electric, or a faithful archtop, the Eastman serial number lookup tool above decodes your instrument in seconds. Enter your serial number and get production year, factory location, and country — all free, with no sign-up required.

Our decoder checks several Eastman serial formats. Eastman excludes SB models from its published dating rules; contact the manufacturer to date an SB. A serial alone does not establish the model or authenticate an instrument. If you're buying used, authenticating a recent purchase, or simply curious about your guitar's history, read on for the complete guide. And if you're worried the deal is too good to be true, the free fake guitar quick-check runs the classic counterfeit tells — price, seller behaviour, serial, decals, workmanship — and returns an instant risk band in two minutes.

Own another guitar? We also have free serial number decoders for Fender, Gibson, Squier, ESP, LTD, Schecter, Charvel, Epiphone, Gretsch, Ibanez, Jackson, Martin, PRS, Taylor, Takamine, Yamaha, Chapman, Guild, Harley Benton, Rickenbacker, Cort, and Seagull.

Part 1: Where Is My Eastman Serial Number?

Before you can use the Eastman serial number decoder, you need to find the number on your instrument.

• Inside the soundhole (acoustics): The serial number is most commonly printed on the interior label, visible through the soundhole.
• Back of the headstock (electrics and archtops): Many Eastman electrics and archtops have the serial stamped or printed on the back of the headstock.
• Neck block: Some older or special-order models may have the serial on the neck block inside the body.
• Certificate of authenticity: Higher-end Eastman models ship with paperwork that includes the serial number.

Pro tip: Use a flashlight and small mirror for acoustics. Eastman labels are typically white or cream with black text, and the serial is clearly marked near the model name.

Worked Examples: Decoder Output for Each Format

These rows are generated from the same decoder that runs at the top of this page. The serials are made-up numbers that follow each Eastman format, so you can see how your own number should read before you enter it.

Part 2: Letter Prefix Format (2020+)

Eastman's official FAQ describes the modern format as a category letter followed by two year digits and a sequence. The manufacturer excludes SB models from these rules.

The decoder reads the year without guessing a model line from the prefix. An unfamiliar single letter does not by itself invalidate the date pattern. Two-letter prefixes and future years are not treated as supported dates; contact Eastman with the model and serial for confirmation.

Worked Examples

• M2005121: 20 indicates 2020; sequence 05121.
• E2212345: 22 indicates 2022; sequence 12345.
• P2312345: 23 indicates 2023; the decoder does not identify the model line.

These are format examples, not verified individual instruments. The result's year is conditional on the instrument using this system and not being an SB model. The serial does not identify a specific workshop.

Part 3: 8-Digit Format (2014-2019)

Eastman used an 8-digit numeric format during the mid-2010s. Two overlapping interpretations exist in this window, so the decoder tests both.

2014-2016 Variation: D1 D2 D3 D4 + sequence

Example: 10351234 → D1=1, D4=5 gives year 15 (2015); D2=0, D3=3 gives month 03 → March 2015.

2016-2019 Variation: D1 D2 D3 + sequence

Example: 15712345 → D1=1, D3=7 gives year 17 (2017); D2=5 means September/October 2017. The month code runs from 1 (January/February) through 6 (November/December); 7–9 do not match this rule.

Because these two variations overlap, very short production runs or unusual sequences may require contact with Eastman for confirmation. The decoder returns the most mathematically consistent result.

Part 4: Pre-2014 Sequential Numbers

Before 2014, Eastman used simple sequential numbering without an embedded date code. A serial like 12645 is valid, but it only tells you the guitar was built before the dated formats began.

If you have a pre-2014 Eastman, the best way to determine the exact year is to:

1. Note the serial number and model name.
2. Contact Eastman customer service or an authorized dealer with the serial.
3. Cross-reference cosmetic and hardware details with known catalogs from the era.

Early Eastman guitars are less common, so precise dating can add meaningful context for resale or insurance purposes.

Part 5: Eastman Factory Locations

Beijing, China — Manufacturer Context

Eastman's FAQ identifies its workshops as Beijing, China. The decoder displays that manufacturer context; the serial-number rules do not identify a particular workshop. Confirm the model and label if you need instrument-specific provenance.

Part 6: Era-by-Era Changes

1990s: Founding and Early Production

• Serials: Simple sequential numbers
• Key Models: Early archtops and classical guitars
• Production: Very small batches, hand-built in Beijing
• Notable: Eastman began by supplying archtop parts and instruments to the international market

2000s: Acoustic and Mandolin Expansion

• Serials: Sequential numbering continued
• Key Models: AC series acoustics, MD series mandolins
• Production: ~5,000-10,000 instruments per year
• Notable: Reputation grew for all-solid-wood acoustics at mid-range prices

2010s: Dated Serial Formats Begin

• Serials: 8-digit numeric format (2014-2019)
• Key Models: AC322, AC422, E series electrics, archtop AR series
• Production: ~10,000-20,000 instruments per year
• Notable: Product line diversifies into electric guitars and ukuleles

2020s: Modern Letter-Prefix System

• Serials: Letter prefix + YY + sequence
• Key Models: AC series, SB series, T series electrics, U series ukuleles, MA mandolins
• Production: ~20,000-30,000 instruments per year
• Notable: Year digits for supported non-SB serials; model line needs separate confirmation

What an Eastman Serial Number Can't Tell You

• An exact year for pre-2014 sequential serials. Eastman numbered guitars in one sequence before 2014, so the number alone doesn't give a year.
• The model line from 2020-on serials. The letter prefix is part of the dating rule, not a model code. Read the label for the model.
• Whether the guitar is genuine. A serial that decodes only shows the number fits Eastman's formats.
• Its value. Model, top wood and condition decide the price.

Summary: Quick Reference Table

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