The refurbishment and diversion of Tokyu 1000 Series started, which realises the retirement of Tokyu 7700 Series and 7600 Series.
Then, I am worried about 7700 Series 7910F set, known as the first carriages with full stainless steel body in Japan which was first numbered as 7001F set.
7001F set has been in service on Toyoko Line, also sometimes went through to Tokyo Metro Hibiya Line, since 1962. In 1988, the set was renumbered to 7910F and the bogies, machinery, and interior of the carriages were modernised. In 2012, its exterior was restored to the original design for the 90th anniversary of Ikegami Line. The original number on its front also showed again in the special service.
Many railfans may wish 7910F preserved in good condition.
In my opinion, it would be better to be restored to the original design for preservation. However, the interior and electric equipment kept after the refurbishment.
There is the only way to reequip the old bogies from the other lines on which 7000 Series is or used to be in service because Tokyu doesn't stock the bogies.
Among the fifty-four carriages on the other lines, the two suspended ones on Mizuma Railway Mizuma Line in Osaka keeps the bogies. Together with the destination indicator and the number plate used on the event in 2012, the set would be nearly restored to the original design.
Also, I wish the set moved to Ueda Electric Railway Bessho Line for the event train. Because of the length of the platforms on Bessho Line, the set shortened to 2-carriage set.
However, Ueda Electric Railway plans to introduce four more variable frequency drive carriages from Tokyu for the modernization. Because of this, the company may have feelings of resistance toward the preservation of the old-fashion carriages. I wish the first stainless steel carriage keep running.