The cards were signed in just a few sittings and exhibit extreme variation which is not unusual for him. I think 2 different pens were used. They are 3.5" x 5" IIRC and have a linen finish. The majority were preserved by an industry executive and sold after his death by a well known source - first at $149, then $199, then $249 and now I believe $385. I had about 10 and saw about 75. The fuller examples contain two "apostrophes" - one for the "i" and one by the date. The best IMO are those in the darker pen and the signature does not touch "WITH COMPLIMENTS".