Fuel tank location for genuine series 3 military

Hi all, new here but do only military series 3 LWB have fuel tanks under seats…I am looking at one 1977 but it has normal fuel filler on outer side like normal ones. I am grateful for any views, thank you
Hopefully will be posting my new baby here soon!

109's soft tops and hard tops did have side tanks to mid 70's

welcome to Landyzone, My 88 has a second tank under passenger seat that you fill directly into tank.

Ex-military 109 1974:

Hi all, thank you for your replies, so does that mean if it’s got a normal fuel tank, despite looking like a military, it is civvy , did ex military ever have normal fuel tanks? Sorry to not understand but trying to determine if it’s genuine military. My last series 3 was genuine and had under seat tanks.

I think some civvy spec 109" were used by the forces. Most military were underseat tanks though.

The above is correct. If military were short of Land Rovers and needed some in a hurry they would purchase a batch of standard civilian ones and use them for things like base transport/driver training ect.
So yes you can have ex military that are civvy spec.

Thank you all for your advice and photos on this, I understand it more now and am very grateful. @tottot especially interesting fact.