Hi, Tom,
Thanks!
Yes.  Sun3 mouse has RJ-11ish connector.  It plugs into the keyboard which
has a DA15 for the host.  Totally different plugs from Sun4 and later.
Ethan Dicks
2447 N. 4th St.
Columbus OH 43202
On Wed, Oct 27, 2021, 01:09 Tom Uban via cctalk <cctalk at classiccmp.org>
wrote:
  Located. It was actually sold for Prime Computer and
is black, but is new
 in box with pad.
 Mouse Systems MSC 401162-019/B with the 6 pin RJ11ish connector that I
 believe was used on Sun3 systems.
 Let me know you address if you are interested.
 --tom
 On 10/26/21 9:45 AM, Ethan Dicks via cctech wrote:
  On Tue, Oct 26, 2021 at 2:43 AM r.stricklin via
cctech
 <cctech at classiccmp.org> wrote:
> 
https://www.ebay.com/sch/xi_jinping/m.html?item=334195034340&hash=item4…
 >
> Hadn't realized before that there were Sun-2 mice which weren't black 
(were white/beige). I know some folks are looking.
  I am in need of a Sun3 mouse but that one looks
like it got pulled out
 from under the porch.
 -etha