Consider the design of the devices. They are tapered at the top and wider at at the bottom. (That allows the coins and the dies to go their separate ways after the strike:
They are incuse on the die, with the tapered end down in the die. So it grease fills, just the base of the device will rise above the fields. But if the devices were normal from the strike and other coins made contact with the coin, they can wear/or flatten easily. On the 'L' the foot looks larger,while the verticals are thinner. So either some grease was making a partial fill and the foot got flattened in circulation. 'BERTY' is also showing contact marks on them also. But I see no evidence of a doubled die on this coin.