L-11700 |
Note face in the center, which is similar to the A-33410 knob but with a markedly different perimeter design. Knob diameter is 2 1/2 inches. Custom design for Daniel Burnham's Land Title & Trust Building in Philadelphia. The later adjacent annex building used P-49240. Together below are the 2 1/4 and 2 1/2 sizes, details of the Corbin screwless attachment and the spindle used on the locks that allowed the exterior knob to be locked while the interior knob to operate.
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Dates:1898
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