Turkey 1 lira 2011 bear - Brass -mono-metallic?

[Pabitra]

Such bi-metallic coins are usually made by feeding a pill and ring into the press. They are put together and struck in a collar. Because of the pressure of the strike and the collar, the metal of the pill and the ring are pressed together. To help that process, the pill and ring have matching blips and cavities.

According to my experience, pill and ring are pressed together to make a blank. Then the edge is made if it not plain.
Then the process of striking takes place.

Recent edge errors ( or variations) of bimetallic 2 Euro Red Cross coin of Belgium in indicative of that.
Belgian mint bought blanks with lettered edges from Dutch mint. So we have three variants - Dutch, Italian and Belgian edges. The blanks were then struck with Belgian die and punch.

If Turkish mint buys blanks from some other mint, mono metallic blank could be there for all you know as long as it is of the same diameter.

[Figleaf]

It doesn't matter if they make the blanks themselves or outsource it. If the ring is made of the wrong metal, there will be a large amount of rings in the wrong colour. Even if the minters don't notice it, it is inconceivable that quality control would not notice such a very obvious mistake.

The case of the wrong lettering is quite well explained: the Belgian mint bought rings that were quite correct, but not for their coins. Such a mistake is much harder to notice.

Peter

[Pabitra]

If ring and pill are separately taken and made into a coin while striking obverse and reverse with punch and die then when is the lettering of edge done?
Is it by a collar die?
Under such cases, older lettering will be fully or partly overwritten.

Were the rings bought with lettering on the edge already made?

Perhaps shift the thread to a different head and explain the process in detail please. I want to understand it in exact sequence.
Thanks in advance.

[Figleaf]

The rings are usually made complete with edge decoration/inscription. Striking the coin would not change the edge inscription.

Peter

[Pabitra]

Would it not make it less sharp, due to the fact that the edge will hit a collar?

[Figleaf]

Don't know how it's done, but that is how it's done. Maybe the collar has a rubber-like inside layer?

See the recent hoopla over Belgian euro coins with Dutch and Italian (?) edge inscriptions. When the Belgian mint got the rings, they already had the edge inscription.

Peter