I cannot see an "AB", but maybe it is on the reverse of what I assume to be a postcard.
Here is an horizontal image.
I suspect that it was a few lines penned by a writer for a card publisher, in much the same manner as those in greetings cards,

There was a link on Google search to an Antique postcard with these words but link is now broken or not available. Probably an item on ebay.

Login to Like
this post