Fake Coins?

Are the coins magnetic?
Look at the side of the coins. Do you see a line that runs along the coin? As if two parts are put together?
I looked for weights and dimensions, but could not find anything

coin #1
German states
Georg III, Ludwig IV and Christian
Thaler 1657
Dei.Gratia.GEORGIVS.LUDOVICVS.CHRISTIANVS.FRATres
by the grace of god, brothers Georges, Louis, Christian
DUCES.SILLESI.LIGNICENSIS.BREGENSIS.ET.WOLAVIensis.1657
Dukes of Sillesia, Liegnitz, Brieg an Wolhau
Real? Doubtfull because Sillesi is written with 2 L's on your coin. The coin of 1656 does to.
The picture of the 3 brothers does not fit the real coin of 1657 but fits the coin of 1656.
The overall details are to crude.
http://www.ngccoin.com/price-guide/...-duid-375365

coin #2
German states
Johann Georg I, Christian II, August
thaler 1598
CHRISTIANus.IOHANnus.GEORGius.ET.AVGUSTUS
FRATres.ET.DUCES.GES.SAXONiae
Christian, Johann Georg and August, brothers, Dukes of Saxony.
http://www.ngccoin.com/price-guide/...-duid-393351
Fake? I am not sure. Looks right

coin #3
Jacob Kettler
thaler 1643
reported, not confirmed (see NGC link)
MONETA NOVA ARGENTEA ANNO 1643
new silver money year 1643
IACOBI:Dei:Gratia:DUCIS:CURLANDIAE & SEMGALLIAE
Jacob, by the grace of god, duke of Courland and Zemgale
http://en.wikipedia.org/wiki/Semigallia
http://en.wikipedia.org/wiki/Courland
http://www.ngccoin.com/price-guide/...-duid-203349
If this coin is real, you are a rich man
The details are very crude

coin #4
Poland
1748 (3 august)
http://en.wikipedia.org/wiki/August_III
AUGUSTUS III D.G. REX POLONIARUM
August III, by the grace of god, king of Poland
DE REGE ET REPUBLICA BENE MERENTIBUS
The king and the state deserves good
Is a commemorative medal:
http://pl.wikipedia.org/wiki/Medal_Bene_Merentibus
translation with google (has some translation errors)
'Medal "Bene Merentibus" ("Well deserved") - medal was established in 1738 by King Augustus III of Saxony.
Second, in addition to the Order of the White Eagle, the Polish medal for merit.
Decoration medal made ​​in the name-day of the king that is 3 August.

Description badges
Medal was silver and had a diameter of 52 mm. It showed on the obverse a bust of the king,
and the rim was an inscription in Latin AUGUSTUS III DG REX POLONIARUM
(Augustus III of the grace of God, King of the Poles).
On the reverse in the middle was a table with a chain of the Order of the White Eagle,
and the rim was the inscription in English.
Latin REPUBLICA DE REGE ET BENE Merentibus (Well deserved for the king and the Republic).
Below was the date of posting such. MDCCXLVIII / 3 Aug.
(medals were minted each year on the same date daily and the date of the current year).
The author of the coin was a Christian Sigismund Vermuth, working medalist at the court of Augustus III.'

Ok, so first I have to say a big thanks to sel_69l, Groszy and of course Petrus. I can tell you now that the coins are fake and I just had another lesson in not knowing my coins. It was a minute deal and I just had to give it a shot because it looked way too good not to be fake but I just had to take a shot.
The coins are now on my hall of shame.

These are known modern copies, most likely of eastern European origin. He is another example:
http://www.ebay.com/itm/German-Thal...em4d2285fda6