Odd looking guide bars

[Jon1212]

I was picking up some new, and NOS guide bars yesterday, and found these.

They have the old Oregon three rivet tips, are 24" 3/8 050, and appear to be D025 (Stihl 3003) mount. However there aren't any visible markings on either of the bars. Has anyone seen a bar like these, before?

 

[Gypo Logger]

Ya, I've had a few of them. The tips don't stand up to any side flexing.