On Mar 18, 11:28*am, "Victor Manta" wrote:
The question refers to a letter apparently having the C6 format (4.5 x 6.4 -
have nothing in hand to measure it) that contains just a sheet of paper
(hence low weighted).

It was sent from and to New York City.

I wonder:

- Why was it franked twice, at two different dates?

- Why are the rates different?

- Why has the value on one metering stamp 3 leading zeros and it has only 2
on the other (maybe different postage meters used)?

The scan of the right side (about 1/3) of the letter, zoomed, is shown he

http://www.artonstamps.org/Countries...st-class-lette...

--
Victor Manta

Note:

45 cents is the US domestic rate for a first class letter up to 1
ounce.
(maximum size of up to 11.5 inches x 6.125 inches x .25 inches)

90 cents is the US domestic rate for a large envelope up to 1 ounce.
(maximum size of up to 15 inches x 12 inches x .75 inches)

Blair