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Vintage Blueprints
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A stack of old railway design blueprints printed on vellum paper
Antique Draftsman Set
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-- with pairs of compasses and other drafting tools
Vintage Ampmeter
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-- other names are ammeter or voltmeter
Microscope Closeup
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-- closeup of the rotating lenses; for science and research themes
Microscope from Below
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-- with a rotating lens; for science and research themes
Microscope Closeup
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-- with a rotating lens; for science and research themes
Microscope in Action
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-- closeup of the rotating lenses; for science and research themes
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