1917 Upper Band Marking

[Stoshu]

In the right light, the capital D looks as if it have been placed over a large capital E... and I would guess like everything else it might mean Eddystone

I recently bought a M1917 Winchester, it has a Eddystone stock, yours E is slightly less faded then mine. As far as the D, I do not have any idea, but this is the right place to find the answer.