1. Identity & Origin

Clockmaker: Dietrich Koch (signed “D. Koch”)
Associated Family: Heinrich Koch (brother; clockmaker but never signed clocks)
Workshop Location: Stromberg bei Eitorf, North Rhine–Westphalia, Germany
Circa: c. 1845–1860 (mid‑19th century)
Regional Style: Rhenish / Biedermeier

Historical Context:
Dietrich Koch was a rural master clockmaker serving the Sieg River valley. During this transitional period in German horology, many craftsmen acted as master finishers: acquiring high‑quality movements (likely Black Forest‑made) and completing them with locally produced cases, dials, and brass work for regional clients. Production was small‑scale and largely handcrafted.

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2. Mechanical Specifications

Movement Type: 30‑hour, weight‑driven rope‑drive movement
Drive System: Rope and pulley system using hand‑braided cord with lead‑filled brass canister weights (pre‑chain design typical of mid‑century clocks)
Escapement Regulation: “Cow‑tail” pendulum with brass‑faced lead bob
Plates: Solid metal plates, indicating quality construction and durability
Function: Time‑only or time‑and‑strike, depending on configuration; some examples include bell striking for hours

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3. Dial and Case Features

• Roman numeral chapter ring
• 60‑mark outer minute scale
• Regulator‑style dial emphasizing precision
• Ornate brass maker’s plaque signed “D. Koch”
• Case style consistent with mid‑19th‑century regional wall regulators

The signed plaque suggests pride in craftsmanship and strongly indicates a custom or limited‑production piece rather than mass manufacture.

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4. Attribution and Maker Identification

Horological directories list only one confirmed clockmaking family in Stromberg bei Eitorf:

Heinrich Koch

• Listed as clockmaker
• Never signed clocks

D. Koch (Dietrich Koch)

• Signed clocks
• Almost certainly the maker of this Stromberg clock

Because Heinrich did not sign clocks, any surviving clocks marked “D. Koch” from Stromberg bei Eitorf are attributed to Dietrich Koch.

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5. Meaning of “Stromberg bei Eitorf”

Stromberg was a very small rural settlement and not independently recognizable outside the region. The phrase “bei Eitorf” (“near Eitorf”) was added for practical identification purposes. Eitorf was the nearest known market town with postal services, trade routes, and church records.

This practice was extremely common among 19th‑century rural German clockmakers and served as a form of geographic clarification rather than indicating work done in Eitorf itself.

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6. Geographic Clarification

The Stromberg referenced on the plaque is:

Stromberg (Windeck), Rhein‑Sieg‑Kreis, North Rhine‑Westphalia

• A hamlet within today’s municipality of Windeck
• Near Leuscheid and Eitorf
• Not related to other towns or regions named “Stromberg” in Germany

Most Probable Workshop Location:
Within the village of Stromberg itself, likely in a residential farmstead or mixed craft household along the old ridge road between Leuscheid and Eitorf.

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7. Rarity and Significance

• Production was low‑volume and handcrafted
• Few clocks were made; fewer survive
• Signed examples from Stromberg bei Eitorf are rare
• The label strongly supports authenticity, regional origin, and historical value