Examples of the type

1 の例の画像 1 Centavo 1 の例の画像 1 Centavo
© ABBE ( imot ) (CC BY-SA)
Private collection
1918 S – (en) small "s"; common; see comments
24.8 mm • 5.3 g
The 1 centavo 1918 USPI coin specimen i discovered definitely has NO “S “ MINTMARK or DOT above where the mintmark is supposed to appear.