Here is one in our collection for comparison purposes.
"Forget-me-Not" floral, 1982, 3 1/8"w x 2"t, 16.7 ounces. Note the ID cane and engraving.
The PS cane on your eBay weight is accurate for this time frame, and the ID engraving matches the methodology of Paul Stankard.
I would give the subject weight a true positive as a Stankard.
PS: the price as of now is "steal"