10 Pfennig 1873 C - With Reeded Edge - Is this a pattern coin?

Hi, I just acquired one of these 10 pfennigs and discovered that this coin has reeded edge instead of plain edge. It is a 

10 Pfennig - 1873 C, German Empire, KM # 4, Diameter - 21.08 mm, Weight - 4.08 grams, Thickness - 1.58 mm. I was wondering if this coin is a pattern coin, KM# Pn7. If anybody has any information and explanation feel free to respond. 

Possible pattern KM# Pn8 or PN8a both of which have C mint mark.  They are not in the Numista catalog and I don't have any more information about them.  Pn4 only has G mint mark. Perhaps the referee has additional information.  

Sorry , trying to send a link that failed

Thank you for your response, I will try to research it as soon as i get a chance. This helped a lot. 

Hi, I looked over these patterns, specifically, PN8 and PN8a, which should be 1873 C ,as mentioned by my fellow coin collectors,  but with “no” note on 1873 C with reeded edge. In my case, the coin I obtained has, I assume, fine reeded edge like it is on PN6 10 Pf 1873 A. My biggest regret is that there are no photos available to see an example or to look over any completed auction so I could get a better ideas for comparison.  If anyone has a credible link feel free to post it here.  I find this coin to be an incredible find that I would like to figure out and assign it properly in my lil pocket change. Thank you for all your help guys. 

Here's another 10 pfennig 1873 C with reeded edge: https://www.acsearch.info/search.html?id=333400

Unfortunately no picture of the edge nor any mentioning of a pattern coin.

Dear Essor Prof,

Thank you for the input. This is exactly what I was looking for, a verification of this coin, and an auction that already happened so I could compare it to the coin I own. Also, I am glad that I took a photo of an edge of this coin (since it seems that rarely sellers post an image of an edge) and posted here.  This might help to some other numismatist to get better knowledge of what  might be in their collection.  

Moreover, would you say that this coin will fall under The category of a Pattern coin or an error coin that could be categorized as an Error coin (minted on  a wrong planchet)? 

I think if it's a pattern coin the auction house would have mentioned it (at least they should have). So I don't think it's a pattern coin (but it's just my opinion).

Could also be seen as a trial to test security features… looking at the very shallow reeding I would guess they were not that successful.

Essor Prof

I think if it's a pattern coin the auction house would have mentioned it (at least they should have). So I don't think it's a pattern coin (but it's just my opinion).

Yes, I was kind of wondering too why that auction house didn't specify a little more (if it is a pattern coin or not) on the origin of the coin.  It is also hard to deduct more from the posting of that auction since they didn' show any photo of the edge.  However,  I am still looking for additional auctions or articles that would provide more explanation.  

Idolenz

Could also be seen as a trial to test security features… looking at the very shallow reeding I would guess they were not that successful.

Yes, the reeding is very shallow and shows some wear from the circulation. I don't even know how that fine edge reeding looks on the 10pf-1873c, in order to get a better idea. The link that  was provided by Essor Prof took me to a former auction from 2006 and that auction house  had a sale on  this coin with fine reeding, but auction house provided that auction only with obv and rev of the coin, no photo of the edge :( . 

P.S. I will try to do some research tmrv and see what I can find. Thank you for trying to help out. 

Your coin did not circulated there are like near zero wear patterns. It's just a bad reeding job with to little pressure.

Hi, Do you have any recommendation on literature, websites, etc. That I could look over? I would appreciate it. 

Unfortunately I know of non that would specialize in such fringe themes like trials and patterns.

Yes, it is a fringe/niche  but I believe that it will grow rapidly in upcoming decade or decades since there is more interest in it. I believe that there should be specialized  literature that would describe, in detail, and explain all specialty coins, such as pattern coins, mint errors, DDO,DDR,RPMS OMM,  ETC.. The same way this niche developed on American coinage in last few decades due to many great numismats AND associations  and their efforts (Fivaz,Stanton,Flin literature is amazing and very educational).  I have to say that is interesting how these coins come to life and how they fit into numismatic world. It does not help that much that pattern coins are mentioned on the last page in  a catalog, for that specific country and coinage,  without any actual reference. So, you are absolutely correct that there is not enough sources. That's why I am glad for eeveryones input and effort here. 

The problem is their very nature, real patterns are not coins but what coins could have been or will be, the documentation is often slim to non existent (lost or destroyed) and there were only a handful ever in existence. Trials are a few steps along the way to a production coin and there might be dozens to thousand but these kind of numbers are still tiny and 99.99% will never have the opportunity to own one even if they could afford the horrendous prices they most often cost, hampering the interest of the vast majority of collectors.

Yes, you are right. Pattern coins commend huge values, and it is difficult to even find them since they were never approved for circulation, hence they are not official coinage but only suggestion and there is a  very little chance to get them. I don' even remembe if I ever seen 5 korun 1951 czechoslovakian,  aluminium coin, but 1952 is more obtainable.   On the other side, DDO,DDR, ERROR DIES WITH MISSING MINTMARKS,  ERROR PLANCHETS like offstrikes  ETC.. we're huge part of the past minting processes meant for common circulation. Look at beautiful king of Ddo 1c 1955, 1972 double dies ,etc.. (USA).  Absolutely amazing coins that are still there in circulation. A  girl can hope, right lol. You just have to be interested in these coins. For example, not that long ago I purchased a common kreuzer (copper) that I overpaid for, just because that coins has a beautiful triple die on obv. (I might post a photo if you are interested). The story  behind this coin can be  definetely deduced by past processes and hardware used for production, which has changed a lot, like it happened on US coinage. That's why you won't be able to find certain errors and varieties on modern coins of 21st century, due to minting process that has changeddrastically. Also, I have to educate myself little more on European coins of certain countries in order to get better overview of my personal interests.