This letter is uncommon because the journey between Havana and New York is paid by the recipient. During this period, the letters passing through New York were often carried privately or forwarded by forwarding agents who post the letters in New York. The rate is a double rate 2 x 1F20.

1F20 is probably:
  - New York - France = 80c
  - Havana - New york = 50c - 10c local delivery
Total = 1F20

The 10 in circle could be seen as an anglo-american accountancy marking: 10 cents due by GB to US post .