Mini Salisbury Cathedral by John Constable Postcard? Print Framed 4.5"

Cute mini vintage print of the Salisbury Cathedral by John Constable. I'm not sure what was its original format. Could be a postcard, cutout that's framed? But lots of work was out into framing it.  It's a nice home decor art print. Pre-owned in good vintage condition. There's wear on the frame.  Please review photos for additional details. As is.