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Picture

V-10400

Marked Silica Diatite Patented Dec. 15, 1868 Norwalk Lock. Co. Found with rose patent #113,842,  December 10, 1873 also by H.H. Elwell.  Silica Diatite is the name of a composition of finely-powered silica and gum-shellac - patent #85018 Dec. 15, 1868 by J.M. Merrick.

School:

Composition

Manufacturer:

Norwalk Lock

Dates:

C. 1868

Click on each photo below to view additional images and information.

vine norwalk silica diatite

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Antique Doorknob Collectors of America
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  • Home
  • About
  • Contents:
  • A
  • B
  • C
  • D
  • E
  • F
  • G
  • H
  • I
  • J
  • K
  • L
  • M
  • N
  • O
  • P
    • P-100 Seals
    • P-200 Symbols/Words/Logos
    • P-400 Multi-Letter
    • P-600 Schools
    • P-700 Single Letter
    • P-800 Fraternal/Service
    • P-900 - ID Needed
  • R
    • R-10000
  • S
    • S-100 Enameled Knobs
    • S-200 Enameled Escutcheons
    • S-600
    • S-700
  • V
  • W
  • Updates
  • Join the ADCA
  • Where to Buy
  • Manufacturers
  • Scholarships
  • Contact Us