Quite familiar with the turret ring dimensions you quote, but, my question concerns the assorted junkers referenced by Claymore. You know, with all the interest in such things and the number of times similar questions come up, you'd think there'd be a "turretringdiameter.com" site or similar out there somewhere...
Here is what I've collected over the years
T-34/76 had a turret ring diameter of 1420mm (76mm of 31 then 41 caliber)
T-34/85 had a diameter of 1590mm (85mm of 54 caliber)
T-44 1700mm
T-44B 1800mm for 100mm D-10 prototypes
T-54 1815mm
JS-II 1850mm Soviet source 1800
Leopard 1,2 1980mm
Somua S35 1130mm APX1CE(chemin élargi) turret, 40mm armor , 1.5

man turret
Char B1 1022m (APX4 turret, 60mm armor)
R35 900 or 1020mm
Renault D1 1022mm with ST2 turret
Churchill 1378mm
Matilda 1378mm (adaptor to fit larger centaur turret
A9/A10 1384mm
Crusader III 1410mm
Cromwell 1448mm
Centaur 1453
Valentine Mk XI had a ring diameter of 1466mm (75mmL40)
Comet ring diameter of 1625mm (77mmL49) some say 1524mm
Charioteer 1626mm (high trunnions)
Challenger 1650mm
Comet 1626
Centurion 1880mm
M2A2 897mm left turret, 749 right turret
M2A1 1120mm
M2A4/M3 Stuart 1188mm
M1 Combat Car 1206mm
M22 1206mm
M8 GMC 1382mm
M3 Lee/Grant 1384mm some source 1448mm (37mm)
Ram I noted as 60" 1524mm 2 pdr 57mm
M24 Chaffee had a ring diameter of 1524mm (75mmL39)
M2/M3 Bradley 1524mm
M7 1626mm (57mm gun)
T18E2 Boarhound 1626mm
M4/M6/M10/M26/M36 1753mm
M47/ 1854mm
M6A2E1/T29/T32 2030mm
M103/M48/M1 2160mm
Pz I had diameter of 927mm
35(t) had diameter of 1267mm
PzIII had diameter of 1560mm (37mm-50mm-75mmL24)
PzIV had diameter of 1650mm (75mmL48)
Panther = 65" turret ring 1650mm
Tiger I = 72" turret ring 1830mm
Type 95 had diameter of 1000mm
Type 97 Chi-Ha had diameter of 1350mm
Type 3 Chi-Nu had diameter of 1700mm