540 BC - 515 BC

Tetradrachm / Τετράδραχμον AR 21

SHH 1889

Parameter Obverse Reverse Notes Reference Acquired Donated

15.146 g   20.1-22.0 mm   4.62 eqmm   tmax 5.25 mm   rh 0.3 mm   -:-- o'clock   VF σmax(SigmaTest, 240 Hz) = obv. 17.7, rev. 20.0 MS/m Griffin moving left on base; the right foreleg raised; the tail lifted and curled behind; the jaws widely opened; the long pointed ears layed backwards; the wing shown with the primary feathers individually curving upward and forward; in front, below, an eagle flying right. Quadripartite linear square, with quarters roughly equal and very uneven surface. ? BMC Thrace ---; Copenhagen ---; Dewing ---; May 9/10 (Period I, Group VI); Sear Greek --- Ex Baldwin's, 15.10.2002 Griechisches Münzwerk, Berlin-Brandenburgische Akademie der Wissenschaften, 4.2021

Parameter            Measurement coordinates  r and φ are  referred to the die orientation of the obverse Elektrische Leitfähigkeit SigmaTest, 8 mm probe, 22.8.2021 Comment κΗz 60 120 240 480 960 r φ σ  MS/m mm ° eqmm  Initial obv 27.2 28.7 30.8 34.2 38.4 0 0 4.615  Initial rev 29.8 29.6 29.5 29.8 30.5 0 0 4.615 Composition Niton XL2 air plus, 8 mm Colimator, 16.10.2021 Comments Cu Sn Pb Zn As Au Ag Fe Ni Cr Al Si P r φ % % % % % % % % % % % % % mm °  Initial obv 1.6 0.0 1.5 0.0 0.1 0.3 90.6 1.2 0.0 0.0 1.0 3.3 0.4 0 0  Initial rev 0.2 0.2 0.2 0.0 0.0 0.3 88.3 1.1 0.0 0.0 2.3 6.4 0.9 0 0 XRFComposition Niton XL2 air plus, 8 mm Colimator, Al, Si, P eliminated 16.10.2021 Comments Cu Sn Pb Zn As Au Ag Fe Ni Cr Al Si P r φ % % % % % % % % % % % % % mm °  Initial obv 1.7 0.0 1.5 0.0 0.1 0.3 95.0 1.3 0.0 0.0 0 0  Initial rev 0.2 0.2 0.3 0.0 0.0 0.4 97.7 1.3 0.0 0.0 0 0