In conclusion, why do central banks refuse to release details of the serial numbers of their gold bars Because after all, If the gold is allocated, then there shouldn't be an issue. This secrecy around weight lists appears to be deliberate.

Publishing a central gold bar list would forever more also allow those bars to be independently traced with a high accuracy due to the serial number - refiner brand - year of manufacture attributes.

So there appears to be a concerted and coordinated effort by central banks, most likely formulated and imposed by the large gold custodians, to absolutely prevent any central bank gold bar weight list from ever being published anywhere.