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| 840 UNIT K26 chip on backside | 840 UNIT reverse | |
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| 280 and 840 UNIT chip on frontside | 280 UNIT reverse | 840 UNIT reverse |
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| 280 UNIT chip on frontside | 280 UNIT reverse | |
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| 280 and 840 UNIT chip on frontside | 280 UNIT reverse | 840 UNIT reverse |
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| 840 UNIT chip on reverse side | 840 UNIT reverse | Vinnitsya Crystal |
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| 1680 UNIT chip on reverse side | 1680 UNIT reverse | 1680 UNIT reverse - different chip |