I just bought the following diaphragm from an old company.

Here are the descriptions:

3 x 12348 replacement cone for LF 2080
1 x 51034 Replacement driver HF
2 x 27061
1 x Maxer (12") no other info.

The 51034 is an RCA replacement for 2774 HF driver
Do someone knows the 2774 high frequency driver?

Can some one help me identify the last 2 model number/make?