Hemphill's OR book has it as:
GOOD FOR / 1 / IN / MERCHANDISE / AT / HEIN'S
1¢
18mm Rd Al
I suspect he may have attributed this one using:
CHAS. F. HEIN / AUMSVILLE, / OREGON
GOOD FOR 5 (also 25 & 50¢) / IN / MERCHANDISE
20, 28 & 30mm Rd Al
If that was the case and there are no other factors linking the maverick to the self-identified ones, then the attribution is iffy in my opinion.
Gross' Oregon Supplement lists a maverick:
GOOD FOR 5¢ / IN / MERCHANDISE / AT / HEIN'S
5¢
19mm Rd Al
Again, this may not be a good attribution.
I only have the first edition of Trantow's book and the piece is not listed in it.
My opinion is that there are a couple of possibilities for an attribution for this maverick, but I wouldn't hang my hat on either of them. The 1920 Census of the United States says that there were 6,189 men, women, and children with the last name Hein enumerated that year, so there probably other possibilities out there.
John in ID