[Boatanchors] Beckman Berkeley 7700 Collins 51J-4?

[flood at Krohne.com]

Greetings old wise ones,

Picked up a Pile O' Stuff this AM and was delighted to see what I think is 
a 51J-4.  However, this unit has a grayish flat front panel with engraved 
Beckman Berkeley  name along the top.  If this is common variant / 
subcontract that I "should know about" I'll apologize in advance.  I am 
interested in the history of this radio.  I'm hoping that the 51J-4 dial 
drum label will work here?

John Flood
TASC Department
KROHNE, Inc
7 Dearborn Rd.
Peabody, MA   01960
Tel.:  978-535-6060 / 800-356-9464
Fax:   978-535-8180