Maybe a little late to the main question of this post, but the next pictures will give the answer:
The shots are from the mod F1 1983 + 1984 for rFactor.
It is nex to to realise. I am the modder and got this post searching by google to understand the cockpit.ini working.
The 1st image is from the ATS D6 cockpit with oil and water temperature in one dial.
The 2nd image is from the Theodore N183 cockpit with oil and water temperature in two half dials and
The 3rd image is from the Toleman TG183 cockpit with oil pressure and oil temperature in two half dials.
Well I hope to aid you as you done to me.
For more information please dowload the mod "F1 1983 & 1984 for rFactor" and I hope you enjoy it.