VECTOR: WG 6100 HV Cage Diode Question

Hello Everyone!

Tonight I was in the process of recapping an HV cage P316.  When I 
accidentally removed D902 instead of ZD902 for replacement.  D902 broke in 
half when I was removing it.  I have since installed ZD902 in the proper 
place and I checked my Wells Gardner TM-183 2nd printing schematic package 
to find out what kind of diode D902 is.

The parts list only shows D902 as a "Silicon Diode" with an Atari part # 
99-130448.  No standard part #...  Any idea what I can put in ?  1N4001 maybe ?

If anyone has any information on this it would be much appreciated!  Thanks!

Steve Winslow