The offer is: High stability time base for HP / Agilent 53131A / 53132A counters. 

It is not original HP/Agilent part. 

Easy application into original place and socket. 

Electronic calibration via standard counter calibration procedure.

 

Hand made. 100% quality inspection.

The item for sale is the complete board with OCXO, cable and mounting screws. 

Counter on the picture, is only to prove, correct working calibrated time base.

Example photo - not exactly the one you will get.

If you are interested in exact manufacturing date of OCXO and real photo, please contact me before bidding.

I kindly answer all questions regarding items I offer.