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| Category : Science & Medicine (Pre-1930) > Engineering | Item Id: 34185 | | For: Drafting Drawing Engineering Mechanical | Made for: A. D. AD Maclachlan, Boston, Mass, USA | | Features: Victorian Era pre-1930 scientific instruments | When produced: 1910-1926, early 20th century, rare, vintage WWI | | Included: Leads, compasses, leather case, various tools | Purpose: Valuable complete collectible pre-depression era | | Original or reproduction: Original | Other features: Patent date 1903, embossed in gold, lined case | | Maker: Theodore Alteneder & Sons Philadelphia PA USA | Estimated value: around 300 USD |
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