Bulgaria 20 and 50 stotinki 1999 - angular/square shoulder vs. rounded shoulder

The question is about:

N#2376
and
N#2377

in the above cases varieties are described:
(…) angular/square shoulder
(…) rounded shoulder

Are they really any differences in the shape of (riders' or hores')  shoulders?
or in fact the difference is rather:

Rectangular rim
Rounded rim
(as per 10 stotinki N#2375) 

It describes the rim. This is the picture on 50 Stotinki - Bulgaria – Numista

Let's wait for more confirmation and than I'll ask for change.

The other question is.

Has anyone more 10,20,50 stotinki?

I have only a few of each. Definetly my oldest are firts variety, my newest are second variety. 

However… I have some coins in between…

50s that has letter between thick and thin version, 20s with varius rounded rims.

The newest 10s and 20s I would describe as deep strike. The 50s I have has thick letters but is not “deep strike”….

I did not know those variants, they must have been added since I got my coins, I also have some doubles, I'll have to check later.

Here are mine (the doubles), but I have difficulties in seeing any difference (maybe there aren't?).

10 stotinki

20 stotinki

50 stotinki

Can you also send pictures of the reverses of your coins?

10a

10b

10c

20a

50a

50b

Have fun

Above there are pictures of my stotinki. However I belive we still need help from Bulgaria. 

Some pictures of  50s?

Opinions: 

- if thickness of letters determins ege type?

- if there are bold, thin and medium letters?

Conclusions?

Conclusion is that I need more coins :-).

But seriously: “not enough data”.

Two  described variants exist and I believe your 10b might belong to the rounded edge, thick (and maybe in fact medium) letters.
How many more variants (if any more) are there  I do not know.

Do you also see three  (thin, medium and thick) letter types  on my 50stotinki? (they are low grade)
Are my high grade coins 10s, 20s - just deep strike examples of thick letter round edge variant? 
Or:
Are they another variant?

Can thin letter version have round edge (or it's just something that I would like to see).

So I believe we need someone how has o lot of theses stotinki coins  to help us :-)
 

@Qnko @coinmaniacbg @packer @ivan.garbev @strashimir , maybe you can help us?