The only web information that I have found on these products is on this Japanese website:
http://www.fsinet.or.jp/~ash-k/altec2.htm
There is a 9862 owner on this forum that that describes his system here:
The Altec "4343"
I have had mixed information from the few people that know anything about them. There is no question that they were designed for the Japanese market to be in competition with JBL's successful marketing of their largest monitors into Japanese homes. The former product manager for Altec (who was responsible for the all of the "Model" home speakers such as the 15, 17, 19) said that their design staff had nothing to do with these speakers. He stated that they were specificied and designed by their Japanese distributor Electori. This seems to be supported in pictures I have of the label for the contemporary 6041 that describes it as an Electori Altec Lansing speaker. However the 9862's owned by a forum member has no mention of Electori on the label and is definitely marked "Made in the USA".
The bass driver, mid horn and tweeter for the 9862 appear to have been developed for that system, and with the exception of the 416-8BD, were never used in another Altec system (the 416-8BD showed up as the helper woofer in the contempory 6041).
The only place that I can think of to try and get more information is from Electori. They are still around. However, finding someone there that speaks English and can remember those systems may prove difficult.