In the chapter 957 titled “Ultimate” we got this panel of Gol D. Roger and Monkey D. Garp vs. Rocks D. Xebec:
![](https://www.opfanpage.com/wp-content/uploads/2019/11/FCkxcDJ.jpg)
So I realized that Roger’s sword looks almost identical to the sword Gryphon held by Shanks.
![](https://www.opfanpage.com/wp-content/uploads/2019/11/Gryphon.png)
Gryphon is a durable and powerful sword, being capable of clashing equally with Whitebeard’s naginata, the Murakumogiri, which made the sky split apart.
![](https://www.opfanpage.com/wp-content/uploads/2019/11/maxresdefault-20-1024x576.jpg)
When imbued with Haki, it was strong enough to block Sakazuki’s magma fist without taking any damage.
![](https://www.opfanpage.com/wp-content/uploads/2019/11/ba2a7c0b9005698e313531a68f6ba156.jpg)
Unless Shanks has a near identical sword then I figure they’re the same. So Gryphon originally belonged to Gol D. Roger just like the straw hat.
![](https://www.opfanpage.com/wp-content/uploads/2019/11/maxresdefault-1-12.jpg)
*Theory by XraynPR