The two Caluras in the picture above are, at first glance, different from eachother in that respect, one has a seam more like the All American Fife. A neat double layer fold-over while the other one looks more like the old Clarke I have here, from the outside anyway (but lacks the bit standing up on the inside that Clarkes have).
Here you go, apologies for the quality of the pic, on the table beside the keyboard, lit by the light on the table, a bit harsh. You'll get the idea, hopefully, left it a bit larger for detail:
Top to bottom: All American Fife, Calura, Calura and Clarke.

Note the two Caluras on (German ) ebay I linked above have the simple seam, not the 'fold-over' :
here