Detail 01
18:1 gear ratio
Allows precise tuning adjustments.
Product detailSKU #1500000429856
GroverProfessional Mandolin Vintage A Style 409 Series Pearloid Button Tuning Machines Gold
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Independent shopping perspective
The Korena take
Grover’s gold 409 Series Vintage A Style machine heads pair pearloid buttons and a bell-top button screw with adjustable open gears in a modern worm-under configuration. Die-cast plates maintain gear alignment, and the 18:1 ratio allows precise tuning adjustments. The supplied 25/64-inch post-hole measurement and 30.3 mm overall post length define the fit details to review for an A Style mandolin installation.
Strong match
Who this is for
- Vintage A Style mandolin setups needing gold machine heads with pearloid buttons.
What matters in use
The specifications, translated
Catalog numbers tell only part of the story. These are the details most likely to change how this product feels, sounds, or fits into a setup.
Detail 02
Adjustable open gears and die-cast plates
Maintain gear alignment for tuning.
Detail 03
25/64-inch post hole and 30.3 mm overall post length
These measurements are provided for fit checking.
Final check
Know before you order
- 01Confirm the 25/64-inch post hole and 30.3 mm overall post length for your installation.
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01What configuration do the open gears use?
They use a modern worm-under configuration.
02What finish and button style do these have?
They have a gold finish with pearloid buttons.
Reference
Full specifications
The complete catalog record, organized around the decisions musicians make when comparing gear.
1 detailsBody & build
- Color
- Gold
