This from a forum called usmilitaria.
"The seat appears to be a Martin-Baker GRU-7 or GRUEA-7 used in the Grumman A-6/EA-6A Intruder or
EA-6B Prowler. It replaced the Martin-Baker GRU-5 seat in the A-6/EA-6A Intruder. The GRU-7A used
in the F-14A and F-14B is similar."