WEIGHT = 3.005 lbs.
HEIGHT = 10 inches
WIDTH = 5 1/4 inches
VALUE = $1,000 - $1,200

National's Marking
(on back @ the bottom): 89
The number is in the form of "Large Hand-Written Script" which is typical of National's Markings.

Albany's Marking
94 ALBANY FDRY

Note 1:
National sold this doorstop unpainted for 35 cents or electroplated with brass, copper, or nickel for $1.35 per National's 1920's Catalog.
They also sold paint kits or their doorstops painted.

Note 2:
On January 1, 1926, Albany's doorstop sold for one dollar per their old Catalog.