Are these 1S1588 counterfeits?

[rosssurf]

I do not recall where I purchased these. But, snake oil or not, Is there a relatively easy way to tell if these are legitimate Toshiba 1S1588 diodes?

 

[Bucksears]

Can't say for sure, but man, that blue band looks thicker/wider than any of the 1588s I have on hand.

 

[Bucksears]

Well, I kinda take that back.
I just checked my supply and I still have 6 with a wide band similar to that. But the color is a little darker and the band is further on the end of the diode, almost like a cap. The band on those in your pic almost looks flared out on the end.