Kozuka Signature Identification

A small shakudo kozuka with a dragon and tiger with of gold and silver inlays on the front and a gold textured reverse with a really clear signature that I am not familiar with - any help identifying the signature would be greatly appreciated.

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Kozuka Signature identification

Dear Sir,

to me the signature could be masatsugu or masatsugi. When comparing the signature on your kozuka with the characters depicted in James Self and Nobuko Hirose's "Japanese Art Signatures"I believe that numbers 741 and 972 add up to the characters on your kozuka.

Best wishes