According to the 2016 Scott Specialized Catalog of US Stamps and Covers,
there were 120,280 of these envelopes printed.
The 120,280 refers to the number of first day cancellations applied to U578 in Houston, Texas.
Ah!
Thank you for that clarification.
I was wondering if there is any information on the quantity of this envelope printed?
Also, any information on what the 2.1c rate covered (e.g. had to be in a batch of 100, or just single usage OK)?
Thanks if you can help
SC#U578 2.1¢ Non Profit Org. Envelope Entire (1977,June 3)
re: 1977 USA stamped envelope
According to the 2016 Scott Specialized Catalog of US Stamps and Covers,
there were 120,280 of these envelopes printed.
re: 1977 USA stamped envelope
The 120,280 refers to the number of first day cancellations applied to U578 in Houston, Texas.
re: 1977 USA stamped envelope
Ah!
Thank you for that clarification.