Dhufar State of Oman, 1970's 4 miniature sheets/stamps

Description

A few miniature sheets from Dhufar, Oman State, from the 70's.  I don't know much about these beyond that - if you do, you win, so enjoy!  Just found these in an old estate that I am going through for a family.
I am retired, and as a hobby I liquidate philatelic estates for heirs, families, trustees, and executors, and I have taken on a bit too much lately, so you will see a lot of listings!  I have been APS (and SPA before that!) for 40 years and was China Stamp Society and ISJP for years, but I am far from an expert.
I try and verify everything I list but occasionally I get something wrong - please be assured, everything is fully guaranteed, and I will correct a mistake if I can, and repay expertizing if you get a negative opinion - which has never happened to me.  Buy with confidence!
I try and Use First Class Mail and domestically it usually takes two weeks or MORE for delivery with the virus pandemic and the political intervention in the USPS!  International mail is facing pretty long delivery times – expect 4 weeks for delivery to Asia!   I use USPS First Class mail because most of what I sell fit in a standard envelope and costs are minimal AND I like to use US collectible stamps.
Downside, unless you buy a parcel or something over , I won’t typically provide tracking.
IF YOU REQUIRE INSIRANCE OR TRACKING LET ME KNOW AND WE CAN WORK IT OUT.
When I mail your purchase, I mark it as shipped on eBay.
PLEASE FOLLOW MY OTHER LISTINGS!
Just open up the store icon, or click “View Sellers other items”.
That’s all there is to it!
Thanks for your business!