|  | ANT070 |  | Irish Post Offices & PostmarksDiamond, Crumlin(An Diamant / Cearnog) / Co. Antrim.
The post office opened in 1875-7 and closed between 1987-9. It has previously  listed a recorded SRDS & a rubber mark in English. 
        
          | Diamond, Lisburn /  Co. Antrim Earliest known date - 25 April 1957Latest known date - 25 April 1957
 Postmark type - Circular, Double Ring, Time Code at top, date on two lines as DD MM / YY. Short arcs to sides.
 
 Codes Known - B DR 27mm
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          | Diamond, Cumlin /  Co. Antrim Earliest known date - 24 June 1966Latest known date - 24 June 1966
 Postmark type - Circular, Single Ring, Time Code at top, date on two lines as DD MM / YY. No Arcs.
 
 Codes Known - B SR 24mm
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