I found a wrench that may be what was reported by Bob Wickes as mentioned above.

95961 - ECCENTRIC & GEAR NUT 95961 / Connecting Rod Screw (Bob Wickes had on ToolTalk Aug 12, 2013

The usage is the same but this wrench is clearly marked 95591.

Is this the same wrench but mis-identifed in 2012?
Or is this yet another previous un-reported wrench?

Here 12 wrenches that I have gathered.  They all seem to be similar in nature and may all be Delco related.

Pic 2 common 90257 and common 90258 with centered lug.
Pic 3 heavier R752 and heavier 90258 with offset lug.
Pic 4 spark plug 28248 and even heavier conn rod 90559.
Pic 5 95095 and open end 93704.
Pic 6 elusive 95591 and box end 93704.
Pic 7 28282 and 96080.

Anyone know of any others?

Anyone know of solid evidence to exclude these as Delco related?

Anyone know which wrenches might have been supplied, or intended, for which particular light plant?

Here 12 wrenches that I have gathered.  They all seem to be similar in nature and may all be Delco related.

See above post.  (files too large for a single post)

Pic 5 95095 and open end 93704.
Pic 6 elusive 95591 and box end 93704.
Pic 7 28282 and 96080.

Anyone know of any others?

Anyone know of solid evidence to exclude these as Delco related?

Anyone know which wrenches might have been supplied, or intended, for which particular light plant?

1912 Marshall Wells Hardware Co. catalog pp 497 - Delco Light Outfits

1926 Delco Light Parts and Price List for 750 and 770 models

Thanks four.cycle.

Every little bit helps.  These models only show the two wrenches.

I guess you are the same four.cycle over at GJ ??  I see your posts over there quite often.
(I'm leg17 over there.  I got tangled up here after Noel passed away and had to re-register with a new name.)