IBM 9121 (Computer at bank)

I honestly couldn’t have told you, from memory, what IBM computer we were using at the Bank. However I saw these entries in my log (doesn’t tell me what we were using prior)…

07/02/93 – 9121-210 (ES/9000) ARRIVED TODAY.
07/11/93 – SUN. IN 7:30-12:45PM FOR VM/ESA REL 2 INSTALL.
CALLED IBM LEVEL 1 (1X331) WITH PROBLEM DEFINING V=R AREA,
KAREN FAXED ME SOME INFORMATION ON CHANGING THE LOAD ORIGIN
ON THE STAND ALONE LOADER, WHICH WORKED.
ALSO 9121-210 (ES/9000) INSTALL.
BACK 3:30PM-6:45PM FOR PROBLEM WITH VM NOT RECOGNIZING 3890 DEVICE,
WAS NOT IN SYSTEM CONFIG (see previous post).
07/18/93 – SUN. IN 9AM-11AM FOR 9121-210 (ES/9000) INSTALL,
08/27/95 – SUN. CPU UPGRADED FROM A 9121-210 TO A 9121-260.

FYI: These models were air cooled.
Also FYI: According to Wikipedia on the IBM 3890…”This piece of equipment is used by financial institutions to sort and tally all cheques, utility payment and gift certificates at the end of each banking day.

Two dates for 9121-210 (ES/9000) INSTALL?