Now I will add, there may also be a bit of solvent ink weakening as well on the 147 in the OP. But regarding the block I posted above:
"Type 54: Known as wet printing, the paper was too water saturated when the intaglio plate applied the ink (Scott 543)."
The above from: https://www.efocc.org/Resources/Hot...AA_Cover.php
written by John Hotchner in 2000 after years (since 1979) of consulting and input by many EFO experts, including the Bureau of Engraving and Printing (BEP).
For contrast, "Type 53: Inadequately wetted down paper prior to intaglio printing left this stamp with a light impression from inadequately adhering ink (Scott 565).