Bialaddin T-10

There seem to be 2 different Cowls for the Bialaddin T-10. Which is the Older one ?? The one with the Holes or Slots on the Cowl ??
Anyone who knows... This will be a Big help
Thanks !!

 

I believe the one with the slots is the older one.

 

Thanks !! I have one I am selling & I have 2 old Cowls . I Purchased it without the burner But Purchased 2... With Slots & with Holes. now I know
You were very helpful....Again, Thanks !
Regards,
PeterD

 

I'm pretty sure it's the holes are earliest but i may be wrong...

 

You could be right... I'm going by Ian Ashton's book, and it leans toward the slotted one being earlier.
This is the only pressure lamp I own, and I bought it years ago from, who else, Ian!
Love it!