Called thus, for want of a better description.  These tools were modified and issued by Ideal, in what I believe
to be an effort to answer a customer's need or a special request.  The later conversions probably came at a
time when, due to the demands of WWII, steel was in short supply and they had to "make do" with the tools
on hand.  Whatever the time frame, judging by some of these examples, they went to some lengths.
"A busy day in the stamping department"
It looks like a left over No. 3 or No. 10 that was set up for a bullet sizing station but never finished (no sizer
hole in lower handle).  Then converted to a "sliding latch" No. 10 to accommodate the rimless case.  The
original  '256 N[ewton" stamping was overstruck and changed to a "300 S[avage]", and then "250 S[avage]".   
Hybrid 300 Savage - Number 10 nee Number 6 Detachable
Originally a 25-35 Number 6 adjustable with mould, a sliding latch converted the tool to a No. 10
to accommodate the needs of a 300 Savage reloader.
Tool came with the old-style "Whack-a-Mole" case resizer.
A price list that came with the tool, reflecting "the good ole days"
The case extractor evidently had some work done to it later on as the pivot pin still sticks out - or was left
unfinished in the rush to get it out.
An interesting piece from many standpoints.  First it is a somewhat scarce plum-colored version of a No. 3
converted to a No.10.  (You sense that the next one off the production line was the 310.)  Second, it was
converted from a 38-40 to a 45 ACP with the addition of a sliding latch to hold the rimless case for priming,  
Third, it (luckily) had a temporary brass bushing inserted in the priming hole that took a 38 Special-sized
case.  (I was able to pull it out and restore it to a 45 ACP.)  Lastly, it had a bullet-seating die (45 ACP) with
a non-standard stem.
A No. 3 38-40 to a No. 10 45 ACP
Here's a weird one seen on eBay a few years ago.  I passed (and now have regrets) as I thought it was an early
issue that had the mould ground off.  It may have, but the collar on the spigot and the possibility of the tool
converted to an adjustable, with a small No. 3 die,  is intriguing.   (The collar appears to have been turned
and not screwed on, making it a real poser.  "Hey, John, some feller wants a  . . .")
A very early 32 WCF
OK, what do we have here? (Seen on eBay)
At first blush, I thought it was a No. 8 with the bullet-sizing plunger removed.  
Closer inspection revealed no provision for the plunger as well as the mould cut for a heel bullet,
which needed no sizing.  
No patent dates on the reverse when there should have been two in this post-1902 version.  
Best guess is Ideal using an unfinished No. 4 blank, especially given the obvious "L.O.L." add-on.
No. 1 38 Long Outside Lubricated on a No. 4 blank
So, what is this? An adjustable No. 1 - a tool always seen with a fixed chamber or a basement gunsmith's nicely
done conversion?  Because of the non-standard bullet design, I'm leaning towards a custom order.  That added
on "L" is factory.  Another interesting/confusing point is that the bullet seating die is a tad larger than any of
the other dies extant, and the locking ring doesn't have the rounded sides of the standard issue.
Conundrum: A paradoxical, insoluble, or difficult problem; a dilemma.
A No. 1 in an unlisted caliber 32 S&W L[ong] with an unknown bullet design AND an adjustable bullet seater.
An interesting point brought out by an ARTCA member is that the die HAD to be larger than normal since the
fixed chamber was already larger than any existing die.  Curioser and Curioser.
A No. 3 41 Colt to a No. 10
Found in a marked Number 3 box and a 9MM double adjustable die (very sloppy fit).  
Perhaps an "I'll take anything" request that was filled just before WWII when steel was getting short.