Hi Mike, Yes, it's a Collins, contract#14214-PH-51-93. Coincidentally, my R-390A is also a Collins and has S/N 501 (contract 14214-PH-51) Thanks for the reply, Ross ----- "mikea" <mikea at mikea.ath.cx> wrote: > WayCool, Ross! S/N 1501 of what contract from which contractor? > Collins, > Stewart-Warner, Other?