Dangerous experiments

You haven't written. They need to know why. Tell them with a notorious checkbox card!

Illustration by Frank Xavier Leyendecker (1876-1924) from an advertisement for Howard watches (1910).

5 x 7 greeting card (12.7 x 17.8 cm).
Printed in U.S.A. on recycled acid-free paper.
Comes with a matching A7 envelope.

Product code: R079

Price:  $3.50