Found in 356 Pre-A, 1952 to 1954. Models two-ribbed panel is welded into the body behind the front wheel and closes in the body as part of the fender well. This one is for the left side.

Notes:
This separate flat panel is welded over the closing panel on the inner side. Sold separately: 644 501 221 00

For repair purposes, we have this lower part of the closing panel, see 644 502 017 05