Help to identify

i know this coin is thaler from Augusta German state but the strange with this coin is the diameter 41mm??? any idea.

Thanks for your time.

The size of 41 mm is correct.
German thaler from Augsburg (city)
Davenport #1930
KM #184

Thank you for your answer, but the diameter of KM#184 is 43mm and not 41mm

replica?
http://www.silvercoins.com/fake-silver-coins-14-ways-to-spot-counterfeits/

https://www.thesprucecrafts.com/chinese-coin-counterfeiting-ring-4071202

Note the following measurements:
ANS – actual measurement of one coin: 42mm
KM photo: 42mm
KM German Coins photo: 42mm
Davenport photo: 42mm
Cgbfr.com: 42mm
Coinshome.net: 43mm
Numista.com: 43mm
MA-Shops.com: 43mm
Could this be a replica? Perhaps, but being smaller in diameter by 1 mm is not enough to say that it is.
There are three high resolution images at this site to compare with your coin:
https://www.pcgs.com/valueview/augsburg/1765-thaler-d-1930/1157?sn=173485&h=pop

Thank you very much all for your answer.