HEIGHT = 5 7/8 inches
WIDE = 4 1/4 inches
VALUE = $200 - $300

Marking :
97
in script - their typical style

Note 1:
Per National's 1920's Catalog, this Doorstop sold for 25 cents Rough or 90 cents Plated.

Note 2:
OWL is the name listed in National's 1920's Catalog.

Note 3:
This was not listed as a bookend as other items in National's Catalog were.