When did they make the filter with the small raised letters without the silk screen? I have seen a few but of them over the years. I am fortunate to have a virtually flawless one that's exactly like Bills on my 67 Corvette. Those original AC filter elements are really cool.

That would have been for a brief period during the 68 model year, after the embossing changed, but before the silk screen was added.

Large embossed font lasted until AT LEAST 8/1967.

The earliest box date I have for a silk screened filter (which has the small embossed letters and silk screen together) is 3/9/1968.

So the small font without silk screen should fall some time between those dates. (Of course, the window could be shorter than that, but should not be longer than that.)

First off,

Jeff,

I can not express my gratitude and your commitment to the details of this hobby. Your knowledge never ceases to amaze me and I doubt I am speaking for only myself.

Thank you everyone for the replies.

After initially not receiving replies to this thread, I posted this filter up on EBay here:

https://www.ebay.com/itm/376607210634


I offered the filter element to others here for $2500 and will honor that for other paid members. I know it is a crazy chunk of change for a used element but it is one of those devil in the details items. More detailed pictures can be seen in the ebay listing.


Thanks,


Jason

That's all great data.

Great info, thank you! I was told by someone on the corvette forum that the small raised lettered version came out sometime in 66. That really never made sense to me that there would be two different versions of the same filter made at the same time. I thought the only way that would be possible is if there were multiple manufacturers of those AC filters???

There can be some real genius's over there:scholar:

That's why I like it here so much more!

It’s actually not a big job to change the embossing on those molds. The pattern shop probably had updated versions along with older versions on the shelf. It always amazes me that people think that there are hard cut off dates for cosmetic changes. The updated mold could be damaged in production - supervisor calls the pattern shop for a mold replacement - and the old mold replaces the damaged mold. Iron patterns were the same way. Cosmetic changes could be run interchangeably. Engineering changes were more disciplined.

For sure. Today that would require a “TWO” (temporary work order) which is considerably faster than a formal engineering change request.

Learning can be bittersweet.

Air filter on her car.

Now the hunt is on.
AGAIN:biggthumpup:

Here's my 212 air filter, the best I can do until I find a correct one.