Hi James,

Thank you for contacting Mearto with your appraisal inquiry.
I can't tell if this is a flat imperforate, flat perforated 11 or rotary perforated 10 but even the highest value, in mint condition (which yours is not) is $24 for the rotary perforated 10; the flats are worth - in used condition - $1-5
Based on the photos and information provided, and subject to examination, this is:

A 1923 Warren G. Harding Memorial 2-cent Black Stamp
uneven margins, cancelled across the face
1 by 7/8 inch
CONDITION: cancelled across the face, ungraded
$1-5*
*represents a fair-market value for auction purposes; retail or asking price may vary.

Please let us know if you have additional items to appraise, and thank you again for using Mearto.