Early Olds axle grease cap, help ID

[Dan Marx]

Another find. What year Olds does this grease cap fit? Inside threads are in good shape.
Thanks

[nickelroadster]

Need the material it is made of and the inside dimensions. I think it is probably one of the 30 series from the twenties. How thick is it? Is it two piece?

[Dan Marx]

Made of aluminum, single piece, 2 5/8 in ID; 2 7/16 inch thread ID; 2 inch tall.
Thanks for the reply.

[nickelroadster]

I am guessing a little but I think that this goes to a 24-26 model 30. In later years the hubcaps were somewhat flimsier and had the word Oldsmobile spelled out.

[stephen48]

Jack Martells book "Antique Automotive Collectibles' has a photo of an Olds hubcap that looks like this one and it is listed as 1920 .

[nickelroadster]

I don't think it is a 1920 hubcap . Through 1923 Olds used a two piece hubcap that used a cap on top of a sombrero shaped cover. These had a cap somewhat similar to what is shown but all of them had outside threads. Those inside threads look to fit and are the right size to fit a wheel hub, not a sombrero shaped inner hubcap.