Vintage envelope, ACE MOTOR CO. Dutzow Missouri, in n-mint unused new old stock condition. Bit of age toning with the flap being stuck. Size is 3 5/8" x 6 1/2". Scans show the front, back is blank. The black border is so all the edges can be seen and is not part of the envelope itself. NOTE: All of the envelopes I have listed are guaranteed to be 100% authentic originals. They are all clean, unused and new old stock unless otherwise noted. Thank you for your purchase I appreciate it.