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Marked RZM 'M1/156', Argentor Werke, Wien.
A sought after Austrian maker that you rarely find.
Dimensions: roughly 22,8 mm / 5,5 gr.
Composition: Translucent enamel on a silver washed messing planchet
Excellent condition, no enamel damage, lightly patinated on the back.
Working pin on the back.
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