Denarius, type 1, var 1

Obverse

Obverse legend

Reverse legend

Reverse

HLVDOVVICVS IMP AVG (Laureate and draped bust of Louis The Pious on the right. One triangle in front of the letter G).

METALLVM (circular legend around a die surrounded by two hammers. A cross between the two letters M). 

Photo of a coin sold by Classical Numismatic Group, link to the sale and their website: https://www.cngcoins.com/Lot.aspx?LOT_ID=2028&BACK_URL=%2fLots.aspx%3fIS_ADVANCED%3d1%26ITEM_IS_SOLD%3d1%26ITEM_INVENTORY_NUMBER%3d%26CONTAINER_NAME%3d%26ITEM_LOT_NUMBER%3d%26ITEM_DESC%3dlouis%2ble%2bpieux%2bmelle%26SEARCH_IN_CONTAINER_TYPE_ID_1%3d1%26SEARCH_IN_CONTAINER_TYPE_ID_3%3d1%26SEARCH_IN_CONTAINER_TYPE_ID_2%3d1%26SEARCH_IN_CONTAINER_TYPE_ID_4%3d1%26VIEW_TYPE%3d0.

Two other copies preserved at the Münzkabinett der Staatlichen Museen of Berlin, link to the page of their website showing the photo of the first coin: http://www.smb-digital.de/eMuseumPlus?service=ExternalInterface&module=collection&objectId=2355484&viewType=detailView. Link to the second coin: http://www.smb-digital.de/eMuseumPlus?service=ExternalInterface&module=collection&objectId=2376325&viewType=detailView.

The only difference with type 1 is the presence of the triangle in front of the letter G on the obverse. One might think of a die break, but this triangle is visible on other coins with different dies.