Bulgarian (?), and if so, what?

[Gordon Lee]

Greetings Fellow SB (ver. 2.0) Boarders
.
I've had these two little fellows stuck in my "to be identified" folder for the last several years and I'm tired of scratching my noggin every time I look at them.  I'm guessing by the writing that they hail from Bulgaria.  I can not for the life of me remember were I got them, but I've already worn out a 2014 Scott looking for these little devils.
.

.
The paper seems very slick and shiny.  They appear to be unused (no cancellation) but there is no glue on the back.  The reddish brown one has a control number printed on the back.
.

.
If anybody knows, it will be greatly appreciated if you share the information.
.
Respectfully,

Gordon Lee

[rayb]

They are coil stamps (2 is the full set!) issued by Bulgaria 26th Feb 1979. Both values have the security number on every fifth stamp. They are SG2726a and SG2726b.

[Gordon Lee]

Greetings Mr. rayb
.
Thank you most kindly. (I also want to thank the other person that gave the Scott numbers, but his comment was deleted along with Mr. MikeC99's temporary blockage.) The Scott numbers are 2684 and 2685.  It just goes to prove that my old eyes are getting more and more poopy.
.
By the way, these stamps are unused and do have original glue. (Yes, my eyes are getting that bad.)
.
Again, thank you guys.
.
Respectfully,

Gordon Lee