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The RHS 10ATC is made by Huake Instrument Co.,Ltd. This is the scale or should be. Maybe yours was built on a Friday  And the scale is 1.0264 = 35 ppt NaCl. Does the 0 ppt line-up with the 1.00 and does 1.060 line-up with 80 ppt ?
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Boomer:
My scale looks the same as your picture but is further divided in 10th and of course the spacing is different:
The 0 ppt lines up with the 1.00
The 35 ppt lines up with 1.025
The 70 ppt lines up with 1.050 and,
to answer your question the 80ppt lines up with what looks like 1.058, a little hard to read without a line going across.
I just dug up my old Deep Six and my tank reads 1.026 or 35. It read 1.026 and 36.5 on my refractometer last night. It looks like I'll be fine if I continue to focus on keeping my SG as is and not worry about the salinity.
It's a good thing I never paid attention to the salinity side, mostly because it was easier to read the SG scale in 10th. Actually I didn't notice the discrepancy until I read that big long thread.
This was not a cheapo refractometer when I bought it 5-6 years ago. I wonder how many people are keeping their tank at a lower salinity than they think they are?
I ditched my Deep Six after reading threads saying how innacurate they can be. Well I did have a couple others that were not too accurate I must say. They hit the trash can.