I took this card out of a factory set. So it is definitely gradable.
![1988 Topps Mark McGwire rookie Error Card Green Line Down Bat. Printing error](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj2G9dnMYlOuzkn2T65PZfgxxEQWE0XVVHj0eCvCIDZ_ttwzf_CTWkI-hKgvUP11v4PdUSd8quD3ubshQ_MVzqQFJn6AQwhDBzaTAnUDs8SUhOzPxmuUL1XTAehaVHNdvU7Bwh55n2Zqk2tyifMXORUqlGkQsEE3LbyEUfM6OZU0RtaAzfANciGYaaEmco/s1536/IMG_20230801_001.jpg)
The Snorting Bull: 2023 Blake Snell Autograph Count: 7
![1988 Topps Mark McGwire rookie Error Card Green Line Down Bat. Printing error](https://beckett-www.s3.amazonaws.com/news/news-content/uploads/2023/01/2023-Topps-Series-1-Baseball-1988-Topps-Baseball-B.jpg)
2023 Topps Series 1 Baseball Checklist, Team Sets, Box Info, Odds
Not a common misprint. Very noticeable when compared to other examples. I am not a grader but I think it’s a nice looking collectible, centered nicely
![1988 Topps Mark McGwire rookie Error Card Green Line Down Bat. Printing error](https://i.ebayimg.com/00/s/MTUxNlgxMTM3/z/Z8QAAOSwmKBip7iG/$_12.JPG?set_id=880000500F)
1988 Topps 580 Mark McGwire Blue Bat Error Misprint Rookie Baseball Card
![1988 Topps Mark McGwire rookie Error Card Green Line Down Bat. Printing error](https://beckett-www.s3.amazonaws.com/news/news-content/uploads/2023/01/2023-Topps-Series-1-Baseball-Base.jpg)
2023 Topps Series 1 Baseball Checklist, Team Sets, Box Info, Odds
![1988 Topps Mark McGwire rookie Error Card Green Line Down Bat. Printing error](https://cdn11.bigcommerce.com/s-ebhaloj/images/stencil/500x659/products/29558/92932/IMG_8929__25717.1686667885.jpg?c=2)
Mark McGwire 1988 Topps All-Star Rookie Green Line on Bat Error
Card is beautiful.
![1988 Topps Mark McGwire rookie Error Card Green Line Down Bat. Printing error](https://i.ebayimg.com/images/g/Z2IAAOSwt2tjPm~q/s-l1600.jpg)
Mark McGwire - 1988 Series, Topps #3 *ERROR CARD*/ White Triangle / PSA MINT 9
![1988 Topps Mark McGwire rookie Error Card Green Line Down Bat. Printing error](https://library.sportingnews.com/styles/twitter_card_120x120/s3/2021-08/rated-rookies-010620-ftr-snjpg_r8688lf4az7f1com1kq4yy3a3.jpg?itok=-yqX5ZgJ)
Rating the Rated Rookies: Examining first decade of Donruss
![1988 Topps Mark McGwire rookie Error Card Green Line Down Bat. Printing error](https://i.etsystatic.com/27896774/r/il/d029ed/4279405074/il_fullxfull.4279405074_5fmp.jpg)
Card Error Mark Mcgwire
1 of a kind of one of the most famous error card of all time. Quadruple error!! 1988 Topps Baseball Error Card Mark McGwire 87 Record Breakers #3 Cyan
![1988 Topps Mark McGwire rookie Error Card Green Line Down Bat. Printing error](https://i.ebayimg.com/images/g/xZEAAOSwCntigVOF/s-l400.jpg)
1988 Topps Baseball Error Card Mark McGwire 87 Record Breakers #3 Cyan Triangle!
![1988 Topps Mark McGwire rookie Error Card Green Line Down Bat. Printing error](https://assets.isu.pub/document-structure/230321171400-4268306618ccf1f60a1a3f357b24f2dd/v1/f650b4a65f2f717a44b72d082e89aeeb.jpeg)
PSA Magazine: 2023 April #016 by PSA Magazine - Issuu
![1988 Topps Mark McGwire rookie Error Card Green Line Down Bat. Printing error](https://i.etsystatic.com/8337568/r/il/ff901e/4651393688/il_300x300.4651393688_do03.jpg)
Mark Mcgwire Rookie Card
![1988 Topps Mark McGwire rookie Error Card Green Line Down Bat. Printing error](https://i.ebayimg.com/images/g/dvMAAOSwvEFfZmaK/s-l400.jpg)
1988 Topps Mark Mcgwire baseball card Oakland A's Green Line