[Tigers] lifting jacks

[Rollright at aol.com]

Hello,
 
I've owned my Mk1A since spring of 1976. When I got it, it came with a  
black jack with appropriate small label that was clearly a Rootes  jack; it fit 
the square body tubes and worked.
 
Years ago, in the late 1980s, I visited a junk yard in Berkeley CA.  There 
was a low-fin Alpine, and I bought the jack it had in its trunk and  brought 
it home to Massachusetts.
 
After recently deciding to refresh/restore my trunk, I started to  think 
about the two jacks. They are almost identical except for difference in  
length. My original (?) jack is about 1.5" longer. Yesterday I looked up in both  
the Alpine and Tiger "TOOLS" sections of their respective parts catalogs. 
The  Tiger Parts catalog contained Mk1-Mk2. Here is what I found:
 
Alpine:                                part  number
up to B395000595  uses          1201342
from  B395000566   uses           5520473
 
Tiger:
up to  B9473324                        1201342
from  B9473325                        5520473
 
 
The Question:  Am I correct in the assumption that the shorter  (earlier) 
jack is # 1201342 and the 
longer (later) jack is # 5520473  ???
 
Thanks in advance,  

Jim  Armstrong
382002083
Mk 1A
code  86