Not sure if this will help but here are a couple of links
www.datsuns.co.uk then click datsun years this one is from my own site and

http://www.ratdat.com/history/history.html
is from good friend Eddie rattley
this might help

I now have an original Datsun 1000 ad from the January 1970 edition of the Readers Digest, so now we have established that there was a 1970 "model", & that they were "sold" in 1970, but your question was "were they MADE in 1970." Still working on that one.

If anyone knows what month the 1200 was released in Australia, this might give a clue as it would take some months between the time a car was made, transported to Australia, distributed to the various state distributors, then to the dealers, & finally to a buyer.
If 1200's came out in Feb or March, then the answer is most likely to be no.

So lets hear from the 1200 historians. When was this car released in Australia. {Check your old Readers Digests]
Chris

I used to own a B10 four door sedan that was originally registered new in February 1970. The chassis number was B10-305152. I'd guess you'd have to allow four months from being manufactured in Japan to being registred here in the UK at least so that would make it late 1969.
I have a Swiss Datsun brochure that, although not dated mentions production figures as-of November 1969. That brochure still shows the B10 in the model line up, although strangely the model shown appears to be a '68.

According to my parts book, the '70 model sedan was numbered from B10-350-001 for right drive cars. It looks like you have a '69 model car [from B10-250,001 for 2 door & from B10-200,001 for 4 door, right drive]
It is not uncommon even today for some cars to remain unsold for quite a long time & it would appear that your car may have been as much as a year old before some lucky buyer took it home.
Chris

That is possible. I believe some early Datsuns sold here were actually shipped from Japan to Holland before being shipped over here. that would have taken some time. The car probably wouldn't have sat around for long once it was over here though, as there was a very limited supply of Datsun 1000's.

Ratdat
As i had writen before, the 1970 Datsun 1000 was made FROM July 1969, so i guess that they made most, if not all of them before callendar year 1970. This is where some confusion can easily sneak in when the "model year" does not align with the callendar year.
The original question was "were Datsun 1000's "built" in 1970", & so help me, short of contacting the factory, i do not know for sure how to find out.
At this stage, i will speculate that the last of them were manufactured in 1970, but i can't prove it.
Chris

There is a strong possibility that none came off the line in 1970. The new model introduction service bulletin for the Datsun 1200 I have is dated March 1970. So assuming that this bulletin would have been distributed very shortly before the models made there way into dealers, some 1200's would have already had to have been assembled. Prior to that the assembly line would have had some downtime to re-tool for a new model so thinking about it - it does seem unlikely they would have actually built them in 1970. They would most likely hav had enough stock from the 1969 production run to tide them over until the new model was available. sound reasonable?

Ratdat
With a March 1970 introduction for the 1200 i am very much inclined to agree with you. It's entirely possible that B10 production may have been ramped up a little at the end to allow for the lost time in the model changeover.

I was just checking out your site. Impressive! I will see if i can get a KB10 magazine ad to you before too long. I also have some newspaper ads for B10 models but the B20 one might be of interest, if i can fit it in the scanner.
Chris

I haven't done an update on my site in months but have stacks of stuff to go on. More B10 stuff would be most welcome.
Ah, winter is coming now so I should get time for some big updates.

Speaking of ads...here's one from that was in magazines here in early 1969. The car pictured is the actual one I own now!