- Don Mattingly signed 1987 First Day Cover Cachet commemorating his record-breaking sixth grand slam at Yankee Stadium as a member of the New York Yankees
- Features a photo of Mattingly hitting the grand slam at Yankee Stadium as a member of the New York Yankees
- Approximately 3.5 x 6.5” in a 4.5 x 9” slab
- Slabbed and authenticated by ICERT/KSA with an Auto grade of 10; Cachet shows light creasing and cornerwear throughout, otherwise little to no notable handling wear
- Please take a look at our other authenticated signed baseball memorabilia, combined shipping is available
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Feel free to contact us with any questions you may have
- Please see photos; listed condition is not professionally graded
LH/BL
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