I have what is definitely a 1960D RPMM and it looks to be [1960D-1MM-027] but I'm noticing some inconsistencies I'd love to hear comment on. Note I have ruled out the following other potential matches due to confirmed lack of markers:
[1960D-1MM-024]
[1960D-1MM-025]
[1960D-1MM-029]
[1960D-1MM-037]
[1960D-1MM-048]
See blog post for full pictures.
http://blaholdings.blogspot.com/201...60d-rpm.html