You are of course correct that it should by -70 yet until I saw your post I figured it was 70 years prior.
That said, I found the articles to be extremely interesting, especially the part where the Japanese protest to the comments of the Russian who said the Japanese were attacking like “blood-thirsty mad dogs.”
That was of course putting it extremely mildly given what was later learned of Chinese atrocities against the Chinese.
Based on my unscientific review of posts on this topic, I would say you and Petronski are in the minority on the matter of +/- 70 years. Adding weight to the argument is the fact that the Plus posters also have something insightful or otherwise substantive to say about the events under discussion, whereas Petronski never betrays the slightest understanding or interest in the history of the mid-twentieth century. To put it another way, the smart money is on Real Time Plus 70 Years.