Looking For Some Confirmation On 3 DDR's

So I have been trying to decipher watermarks and am having trouble with these 3 different stamps. This is what im thinking and I was looking for some thoughts.... I think the 1st 3 20 pf's are Scott 333's due to the postmarks '57 & '58. The 70pf I think is a Scott 230A and the last ship one I think is a Scott 337 due to the color, I think brt blue not dark blue. I can't see any watermarks. Thoughts, help.... Am I on the right track . Tks much

The 20pf reds are most likely #333, postmark and imprint.
The 70pf also has an imprint and is likely #338, while the 50pf blue has no imprint and is therefore likely #230.
The last two identifications assume no watermark and perf 13.5x13 rather than perf 14

Willwood42 .... hey. so the 50pf, blue ship,does have imprint. Hard to see bc of the picture. So im thinking as above Scott 337. Concur? TKS!!

Stamps4life,

The stamps you are showing a part of the DDR "5 Year Plan" series. It is one of the more complicated DDR series. Sometimes the only way for a correct identification is by watermark.

There are a number of threads here that deal with that series.

Here is an identification guide that might help you get started.
http://www.midwestphilatelicsociety...Default.aspx

Have fun!
Dan

Hey Dan - thanks for the link - very helpful. I know the issue is not being able see the watermarks if they are there. So until I can get someone to help in real life - maybe the stamp club - guess im stuck. Based on the few I've seen on other stamps, id think I could see something - but none at all. tks for there help!