Oil pressure gauge question

[South Gippy Rover]

Hi all,
I have a question about oil pressure gauges.
I suspect that the dash in my 1975 3500s is not the original. (The clue is the hand writing on the back which reads “rover V8 - RHD Km/h”
This is the oil pressure gauge I currently have.



I have a spare dash courtesy of eBay which has this version gauge.



With the exception of the colour is there any difference?
Are they suited for different models?

Any information/knowledge greatly appreciated as always.

Cheers,
Paul.

 

[PeterZRH]

The top one looks right for a 75. The lower is from a very early car. Later cars are rumoured to use up component stockpiles. For example the VIP got side intrusion bars which were only fitted to NADAs some 6 years earlier and must he sat all that time. Later 2200s got V8 suspension setups etc. So labelling could be this or simply an error. I don't think that late there were many exports, some cars I believe were built by the factory for export and converted for the UK market too. Lots of possibilities.

 

[roverp480]

I believe the one with green /red band was to pacify owners of V8's who were worried that 30psi or lower when running seemed too low compared with what they were used too on most engines ,say a 2ooo which runs at 50/60 psi. Smiths specifically stated their aftermarket 0-100 psi gauges were not suitable for the V8 for that reason

 

[South Gippy Rover]

Thanks guys.
The point of the post was to see if the gagues were identical with regards to measuring and displaying the oil pressure.
If they were different I was going to install the one which showed the higher reading!