Pellet tin

Can anyone date this tin? How old is the oldest tin you have? 
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National and Minutemen made in UK are my oldest. Both horrible pellets Ironically, the screw top lid is the BEST I have evr seen. Very coarse threds. Moving the lid from 12 o'clock to 11 o'clock opens. When closed lid is tight. I own 11 tins and use them every day for modern/quality pellets. NEVER a cross thread problem. Why don't all mfg's do this type of tin?