This may be the spec's for the AH panzer. In appearance and armament it matches up. The armor is listed in mm/angle, this is from the achtungpanzer website. It doesnt really cut and paste well as it is in a table form on the website this link might get you there.
http://www.achtungpanzer.com/pz3.htm#panzer4Panzerkampfwagen IV
Specifications
Model: Ausf D
(up-armored) Ausf G
Weight: 20000kg 23500kg
Crew: 5 men 5 men
Engine: Maybach HL 120 TRM / 12-cylinder / 300hp Maybach HL 120 TRM / 12-cylinder / 300hp
Speed: Road: 40km/h / Cross-Country: 20km/h Road: 40km/h / Cross-Country: 20km/h
Range: Road: 200km / Cross-Country: 130km Road: 210km / Cross-Country: 130km
Fuel Capacity: 470 litres 470 litres
Lenght: 5.92m (w/o the gun)
5.92m (with the gun) 6.63m (with the gun)
Width: 2.84m 2.88m w/o Schurzen
3.33m with Schurzen
Height: 2.68m 2.68m
Armament: 75mm KwK 37 L/24
2 x 7.92mm MG34
(1 x MG - hull)
(1 x MG - coax) 75mm KwK 40 L/43
2 x 7.92mm MG34
(1 x MG - hull)
(1 x MG - coax)
Ammo: 75mm - 80 rounds
7.92mm - 2700 rounds 75mm - 87 rounds
7.92mm - 2250 rounds
Armor (mm/angle): Front Turret: 30/10
Front Upper Hull: 30/7
Front Lower Hull: 30/12
Side Turret: 20/25
Side Upper Hull: 20/0
Side Lower Hull: 20/0
Rear Turret: 20/0
Rear Upper Hull: 20/9
Rear Lower Hull: 20/10
Turret Top / Bottom: 10/83
Upper Hull Top / Bottom: 12/84
Lower Hull Top / Bottom: 10/90
Gun Mantlet: 35/0 Front Turret: 50/11
Front Upper Hull: 50 or 50+30/10
Front Lower Hull: 50 or 50+30/12
Side Turret: 30/26
Side Upper Hull: 30/0
Side Lower Hull: 30/0
Rear Turret: 30/10
Rear Upper Hull: 20/12
Rear Lower Hull: 20/9
Turret Top / Bottom: 10/83
Upper Hull Top / Bottom: 12/85
Lower Hull Top / Bottom: 10/90
Gun Mantlet: 50/0