Yokogawa-Hewlett-Packard LTD Standard Inductor SI-10
Vintage Calibration Standard
Original Wooden Case

Up for sale is a Yokogawa-Hewlett-Packard LTD SI-10 Standard Inductor, housed in its original wooden presentation case.

This is not just a component. It is a piece of precision laboratory history.

Produced during the era when Hewlett-Packard test standards defined the benchmark for measurement accuracy, this SI-10 represents the golden age of analog instrumentation. These were built for calibration labs, engineering departments, and serious metrology work — not hobby benches.

Features:
Manufacturer: Yokogawa-Hewlett-Packard LTD
Model: SI-10 Standard Inductor
Original fitted wooden case
Precision laboratory reference component
Heavy, solid, professional construction

Why This Is Special:
Vintage HP and Yokogawa calibration standards have strong appeal among collectors of classic test equipment. Items like this were used to establish traceable measurement standards in professional labs.

The original wooden case makes this especially desirable as a display piece for:
Vintage electronics collectors
HP test equipment enthusiasts
Lab decor or office display
Metrology and calibration historians

These do not surface often, especially complete with original case.

Condition:
See photos for exact cosmetic condition
Wooden case intact with some blemishes (See photos)

Whether you are completing a vintage HP collection or looking for an authentic piece of laboratory history, this SI-10 is a standout example.

Please review photos carefully as they are part of the description.