Genuine

Forgery A

1) The E of OLDENBURG is much shorter at the top. 

2) The cross at the top of the crown reaches down to the middle of the orb over the crown. 

3) The tail of the R of OLDENBURG curls up.

4) There is a clear pearl at the right of the crown.

5) Note the gap and position of the top right ribbon ends.

7) Note the odd shape of both 3s.

8) Note the sizes and positions of the pearls at the very bottom of the stamp.

9) There is a clear + in the circle above the cross in the lower left fifth of the shield.

Click image for plain view

1) The U of OLDENBURG is poorly shaped. 

2) The cross at the top of the crown does not reach down to the middle of the orb over the crown. 

3) The tail of the R of OLDENBURG does not curl up.

9) There is no clear + in the circle above the cross in the lower left fifth of the shield. The lion's head in the bottom of the shield lacks features.

Bibliography

Grosses Handbuch Der Falschungen Lieferung No. 17 Oldenburg, text by Otto E. Stiedl, Photos by Fritz Billig

Album Weeds by Rev. R. B. Earee

Distinguishing Characteristics of Classic Stamps, Old German States. by Hermann Schloss.

The Serrane Guide by Fernand Serrane

The Forged Stamps of all Countries by J. Dorn