I agree with Tony. Made in Poland & that p/n format, that's typically Toolmex (TMX)/Bison. The photo & diagram in that ebay listing is taken from Toolmex's site & they show the same photos for all their APX 90° indexable endmills.
You can use APKT inserts & they will fit assuming the mfg of the inserts follows industry standard correctly. Some insert mfgs call their inserts APXT. You should also be able to use APMT as well.
[TABLE="class: border"]
<tbody>[TR]
[TD="bgcolor: #cccccc, align: left"]Diameter D |
<tbody>
[TD="align: center"][/TD]
[TD="align: center"]2[/TD]
</tbody>
[/TD]
[TD][/TD]
[/TR]
[TR]
[TD] [TABLE="class: border"]
<tbody>[TR]
[TD="bgcolor: #cccccc, align: left"]Shank[/TD]
[TD="align: center"][/TD]
[TD="align: center"]R8[/TD]
[/TR]
[TR]
[TD="bgcolor: #cccccc, align: left"]Overall Length L[/TD]
[TD="align: center"][/TD]
[TD="align: center"]6.125[/TD]
[/TR]
[TR]
[TD="bgcolor: #cccccc, align: left"]Cutting Length l[/TD]
[TD="align: center"][/TD]
[TD="align: center"]1.953[/TD]
[/TR]
[TR]
[TD="bgcolor: #cccccc, align: left"]Shank Diameter d[/TD]
[TD="align: center"][/TD]
[TD="align: center"]R8[/TD]
[/TR]
[TR]
[TD="bgcolor: #cccccc, align: left"]Depth of Cut a[/TD]
[TD="align: center"][/TD]
[TD="align: center"]5/8[/TD]
[/TR]
[TR]
[TD="bgcolor: #cccccc, align: left"]No. of Inserts[/TD]
[TD="align: center"][/TD]
[TD="align: center"]5[/TD]
[/TR]
[TR]
[TD="bgcolor: #cccccc, align: left"]Insert[/TD]
[TD="align: center"][/TD]
[TD="align: center"]APKT 1604, APXT 1604[/TD]
[/TR]
[TR]
[TD="bgcolor: #cccccc, align: left"]Cutting Rake Angle[/TD]
[TD="align: center"][/TD]
[TD="align: center"]-10[/TD]
[/TR]
[TR]
[TD="bgcolor: #cccccc, align: left"]Axial Rake Angle[/TD]
[TD="align: center"][/TD]
[TD="align: center"]6,8,6,8,6[/TD]
[/TR]
[TR]
[TD="bgcolor: #cccccc, align: left"]Radial Rake Angle[/TD]
[TD="align: center"][/TD]
[TD="align: center"]-10[/TD]
[/TR]
</tbody>[/TABLE]
[/TD]
[/TR]
</tbody>[/TABLE]