unknown Kriegsmarine Officer's insignia

[all1knew]

Hello all,

This insignia that has been attached to a modern postcard was acquired in a recent grouping that I purchased. Can anyone please help me identify what exactly I have here?

William Kramer

[all1knew]

2

[jmcm]

Looks like US capt bars

[fldjr]

Looks like US capt bars

with US merchant marine line officer rating,

[all1knew]

thank you all for the help, it appears the Vet hadn't a clue as to what he was looking at (though neither did I)

William Kramer

[JustinG]

Please note, that the double bars, if US and Naval would be the rank for a US Navy Lieutenant (Full grade).

Best Regards,
JustinG