Need a hand identifying some (I think) German medieval coins

I normally only dabble in numismatic material from the 17th century and later, but recently went on a whim and purchased a nice looking group of medieval coins. I believe they are from various German cities/states, but otherwise not sure where to begin. My reference material is sparse on this area and I am having a very hard time reading the legends. Any help/clues you can throw my way is greatly appreciated

#1 top, #2 bottom left, #3 bottom right






#4






#5 same as #4, but with different shields at top




#6 same as #4, but with wheel counterstamp (Mainz or Erfurt?)




#7 same as #4 but with counterstamps that appear to be two winged eagles




#8 on left, #9 on right






#10 - appear to be two of the same type, but a little different.






#11






#12






#13

 

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Can't help with ID, but they are all pretty cool looking coins.

 

#1 looks like a GERMAN STATES SCHWABISCH HAND HELLER or GERMAN STATES HALLE HAND HELLER AROUND 1600

 

Someone on another forum was able to identify all except #9, 10 and 11. At this point I am not even sure if those three are German or from somewhere else. Any clues are really appreciated

 

I have such coin too. It is Meissen (the mark). Groschen (shieldengroshen). XV century. Frieberg Mint.

 

Coin # 13 is a (14)65 Horngroschen from Saxony,
mint:Freiberg, mintmark is cross in square on 2nd
pic. The date is to the left of the m.m. with an over
sized 6 and a medieval 5 that looks like a 7. The
reference # for this coin is I-96a in Robert Levinsons'
book: The Early Dated Coins of Europe 1234-1500.
This coin is in excellent condition and is definitely a
keeper!!