Plymouth Rock Phosphated Gelatine advertising (early 1900s)

Nice image of young boy and girl, 'Which hand will you have?" with boy holding product behind his back.

This is half (nicer?) of a two-page flyer.

 Plymouth Rock GELATINE
                   requires
No lemons, No cooking, no straining.

States that the Plymouth Rock Phosphated Gelatine (White and Pink) has been examined by the State Assayer of Massachusetts!

Early predecessor to Jell-O. Plymouth Rock registered its product name in 1905.

Front side has purple ink stamp 'Mulholland 12 King St'.

Text side has browning and age spot at bottom. 

16 x 9.5 cm.