First:

Coins are ejected from the presses into large bins. Coins continually land on one another and make marks. Your picture shows what appears to be where a rim impacted your quarter (parallel lines). It is likely another coin impact happened to make what looks like a cros bar, and thus the "H."
The dies do not have an H on them in this location (or all quarters struck with that die would have this mark), therefore this is just interesting looking PMD. If it had been an actual letter H engraved into the die, then it would be raised instead of incuse.

Coins are ejected from the presses into large bins. Coins continually land on one another and make marks. Your picture shows what appears to be where a rim impacted your quarter (parallel lines). It is likely another coin impact happened to make what looks like a cros bar, and thus the "H."
The dies do not have an H on them in this location (or all quarters struck with that die would have this mark), therefore this is just interesting looking PMD. If it had been an actual letter H engraved into the die, then it would be raised instead of incuse.
The slabbed Half dollar No G farce: Download No-FG half vs. Grading Company Claims report here:
https://tinyurl.com/yalrstjz or higher resolution version: https://tinyurl.com/y7rksxu8
- How much squash could a Sasquatch squash if a Sasquatch would squash squash?
https://tinyurl.com/yalrstjz or higher resolution version: https://tinyurl.com/y7rksxu8
- How much squash could a Sasquatch squash if a Sasquatch would squash squash?