I don't know about this "replacement" business. My Australian parts book, which lists most of the GX stuff as a limited number seem to have been sold here, makes no mention of it at all.

It would seem that the GX model in South Africa had the standard bonnet /hood as well.

I hadn't heard about this. Are you saying that at some point in 1200 production, Nissan stopped making the original hood, and started making only the newer one, fitting it to all 1200s?

Yes, this is an old thread but might as well update it.

The JDM Sunny 1200 was updated sometime in 1972. It was given a facelift with new tail lights, grille & trim on the sedan & new dash & interiors on both the Coupe & Sedan.

The GL & GX models got the new bonnet/hood & it would therefore be more correctly termed the 'facelift hood' as there would have been a lot more GL's with it than GX's

Some export markets got the GX model, but there was no export model facelift version, even in South Africa where they manufactured the car for their own domestic market.

The export versions that were sold as Datsun 1200's were continuations of the basic 1971/72 car with only mechanical improvements as they were introduced into production.
I'm also not aware that the GL model was sold outside of the Asian market either, so if this is true, then it would be rarer overall as it's availability range [geographically] was much more limited than the GX.

Thus it can be seen that this GL coupe has the correct hood, it being a 1972/'73 JDM facelift model.

Ah, how much we've learned in the last three years. Thanks for sharing this information on the refining of the B110. I have summarized it in the Facelift article: 1972 Minor Facelift.

Note too that these cars were marketed as "Datsun Sunny 1200" in Japan. However, the Excellent models (PB110) appear to have been marketed as Nissans (not Datsuns). This is in line with Nissan used for more luxurious models, and Datsun for the average car lines.

The only spanner in the works is my 1974 PB110 parts book.

The cover bears the FULL model name & it reads
Datsun Sunny Excellent 1400 parts catalog.
Model PB110. 1974

Additionally, through the good graces & extreme generosity of a US based friend, I have the makers ID tags for both the JDM B110 & PB110. They are in Japanese, so I can't read them, but both share identical lettering in the top left corner where the word Datsun appears on the English language versions.
I know not what it says but whatever it is, it's the same for both.

Of interest, to me at least, is the fact that the engine capacity of the PB110 is 1428cc
It's quite unusual to see an engine's actual capacity above the nominal & advertised value.

I learn something new every day. Well there you go, if Nissan called 'em Datsuns, I will too.