Liberty V-Nickel Mintage Question

Well, here's my theory:
Philadelphia had been producing all the coinage up until 1909.. 3 years before the Liberty nickel was ended. Most of the history of the Liberty nickel was within the time that Philly produced all the coinage. I imagine that Denver and San Francisco were pretty "frazzled" with the new responsibilities of making coinage, and the government just thought that, "Hey, what's 3 more years lacking?"

Yup, SF mint came about due to the California gold rush that began a few years earlier. But mainly minted gold and silver.

Copper and nickel coinage was in Philly until the early 20th century.

Let me explain:

Before 1908, only the Philly mint was allowed to strike base metal (copper and nickel) coins. Then, in 1908, a law was passed allowing branch mints to strike base metal coins. In 1908, we sent some copper and cent dies to San Francisco to strike cents, so we have 1908-S cents today. Same for 1909-S, but 1909-S were made in a small quantity because they were struck only at the beginning of the year.

I bet if the New Orleans mint hadn't closed in 1909, they would have made cents and nickels as well.

Anyway, the San Fran mint had been striking cents for a few years, and they were comfortable with it, so they sent some nickel and nickel dies as well.