Thickness appears the same. However, it's clear that the reeding on
the "weakly struck" dime was obliterated outside the Mint. If this
was a genuine case of a coin struck out-of-collar (a cause of absent
reeding) 1) the diameter would be greater than a normal dime, and 2)
the edge would be trapezoidal in vertical cross section, not flat.
If this was a genuine weak strike, 1) there would be a
recognizable "proto-rim" along the periphery of the coin, 2) the edge
would be trapezoidal in cross-section, 3) the rim/edge junction would
be beveled, 4) traces of reeding would be found in the middle of the
edge, not along the margin, 5) there would be weakness on the reverse
opposite Roosevelt's head.
All signs of a genuine broadstrike and a genuine weak strike are
absent. The featureless ring on each face is smooth and lacks
tumbling marks. Yet another indicator of fakery. This coin is bad
to the bone. :)
--- In email@example.com
> I included a picture of this "thin dime" (no reeding)along side a
> normal dime leaning on edge supported by a soda cap.
> They look the same thickness to me, but I'm 3/4 blind.