CO NOS Parts Question--Vent Window Channels

[402Bowtie]

Posting this here as I'm hoping some NOS parts guys can help me out...

Has anyone seen NOS Vent Window Channels without the "A Bailey Product" stamping?

I have some "NOS window channels" in opened wrappers that do NOT have the stamping shown below. Every NOS (& used OEM) one I've seen has had the stamping. I'm wondering if mine perhaps aren't NOS GM parts.

The only difference I can think of is that the ones I have without the stamping are p/n 15662134. The ones with the stamping that I have seen in the past have always been p/n 3936809. Anyone have p/n 15662134 on the shelf that could look for the "A Bailey Product" stamping?




I'm not looking to sell them, but just to be fully compliant with board posting rules, I will sell the vent window channels for $1,000