50 Cent 1923-1928

I'm reading this from my Charlton's Catalogue:

"During the earliy and mid-1920s the demand for 50-cent pieces was very light; only 28,000 pieces were issued between 1921 and 1929. These are assumed to have been almost entirely 1920s. When a greater demand for this denomination arose later in 1929, the Master of the Ottawa Mint decided to melt the stock of 1920 and 1921 coins (amounting to some 480,392 pieces) and recoin the silver into 1929 coins. He took this decision because he feared that the public would suspect they were receiving counterfeits if a large quantity of coins with "old" dates were issued. It is believed that 75 or so 1921s that have survived came from specimen sets sold to collectors or from circulation strikes sold to mint visitors"