Sterling Saint Christopher Medal signed Senator John F. Kennedy

Hello,

I am writing in regards to a religious medal I recently acquired in the
Washington DC area at a Catholic church rummage for 50 cents.

The Sterling medal has the inscription Senator John F. Kennedy on the
inside lid. The medal is made up of two parts that slide/pivot past each
other. It is also marked: I am a Catholic call a priest.

I've included some pictures to better illustrate my description.

I'm hoping to find out if this medal personally belonged to President
Kennedy and if it did, what would be your estimate of its value.

Any information would be much appreciated.

Best regards.

K.