Hi Mark,

Thank you for contacting Mearto with your appraisal inquiry.
1645 is the pattern or model number it's not the date.
Based on the photos and information provided, and subject to examination, this is:

A vintage Colonial Revival style pewter teapot
made by L. or J. Vickers, English, late 19th/early 20th Century
Of bold baluster form with single serpentine handle, hinged cover and wheel-turned circular foot. Marked to the bottom "L 5 / L. (or J) VICKERS / 1645
9 inches tall, 11 inches long
CONDITION: appears to be in good condition with minor wear from age
PROVENANCE: inherited
$30-50*
*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.