romident says R2D tank
Board silkscreen had ORCA(R) and SIGMA
In copper	OVG-17A

.1c	2716 stickered 1
.7l	2716 stickered 5
.1a	2732 stickered 2
.2c	2732 stickered 3
.2c	2732 stickered 4

socketed chip at 4d 	- not sure what kind of chip this is, so not read
	fairchild 
	8110 H03 
	MB14368



WinROMIdent v1.05
============================
orca.2c: (1/1) [FC53C538]
	- r2d3.2c : r2dtank:R2D Tank:Sigma Enterprises Inc.:r2dtank.c
============================
orca.2a: (1/1) [56636225]
	- r2d4.2a : r2dtank:R2D Tank:Sigma Enterprises Inc.:r2dtank.c
============================
orca.1a: (1/1) [7561C67F]
	- r2d2.1a : r2dtank:R2D Tank:Sigma Enterprises Inc.:r2dtank.c
============================
orca.1c: (1/1) [20606A0F]
	- r2d1.1c : r2dtank:R2D Tank:Sigma Enterprises Inc.:r2dtank.c
============================
orca.7l: (1/1) [C49BED15]
	- r2d5.7l : r2dtank:R2D Tank:Sigma Enterprises Inc.:r2dtank.c