Three Holtzapffel Measuring Instruments and a Fenn Instrument, London, late 19th century, two brass and steel 6-in. "T" squares, one marked Holtzapffel & Co., the other Holtzapffel & Deyerlein, both with scrolled ends; a miniature steel and brass depth gauge marked Holtzapffel & Deyerlein London; and a steel caliper with knife-edge outer jaws marked Fenn-London.
Three Holtzapffel Measuring Instruments and a Fenn Instrument, London, late 19th century, two brass and steel 6-in. "T" squares, one marked Holtzapffel & Co., the other Holtzapffel & Deyerlein, both with scrolled ends; a miniature steel and brass depth gauge marked Holtzapffel & Deyerlein London; and a steel caliper with knife-edge outer jaws marked Fenn-London.
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.jpg "Quelle: Christie's")
.jpg "Quelle: Christie's")
