1948-1953 Panhead cam covers have several different versions.
Early 1948 cover is a modified 1941-1947 Knucklehead cover die-cast with a screw plug (a) in overhead oil line hole. The baffle plate is steel and is riveted into the cover.
The baffle plate is steel and is riveted into the cover. (B)
Early-1948-mid-1948 cover Is die-cast. overhead oil line hole has a steel plug pressed in it instead of a screw.
Back of Early-1948-mid-1948 cover remains the same.
late-1948-1950 Is die-cast. on these covers oil line passage is not drilled.
Back of late-1948-1950 cover remains the same.
1951-1953 Cover is sand cast. The overhead oil hole is not drilled. breather tube to the baffle and the pinion busing are not visible on the outside of the cover. (could not find an image of an actual 51-53 cover.
In place of the steel baffle A plate is a cast.
1954-1957 Covers have four ribs. The overhead oil passage remains but still not drilled. and have an updated pinion bushing.
1958-1962 Cover is identical to the 1954-1957 cover except for the generator bolt holes being drilled from 1/4” to 5/16”.
1963-1964 cover has an oil passage added for overhead rocker oil line. A new bolt hole in the top peak of the cover To connect the gear cover overhead oil line passage with the crankcases.
1965 covers are finless and have the outside oiler passage and bolt hole.
The images in this article are not all OEM parts. some are replicas,some are after market. but are similar enough for identification purposes.