I’d say those are the new release SV and S1b - neither of those item numbers cross to any Estes kits - the old S1b was #1229 and #1973 for the Skylab SV fits since 1973 was the year it was launched. So here we have them both as placeholders in an online catalog for a hobby retailer - for all the skeptics saying they’d believe these were coming when the see them, here ya go! I haven’t done anything beyond opening the box and inventorying the parts on my SV #1969 but I’m sure going to buy a #1973 and a S1b (or two).