Your SPHINX CHESS COMPUTER is an ideal opponent. It is ready to play you at any time, as often as you like, at whatever level of skill you choose. Using the machine is simple - you just move the pieces on the chessboard in much the same way as you would against a human player.

EXCALIBUR STILETTO Electronic Chess Computer - picture taken from box.
EXCALIBUR STILETTO MAIN GAME CHARACTERISTICS
LEVELS OF PLAY
The operating key marked LEVEL - which can be used any time when it is your turn to move - enables you to alter the speed and strength of the computer's play. When you press this key, the corresponding light on the control panel comes on, You can choose between sixty-four different levels. On level 1, the computer takes an average of 5 seconds per move. On higher level, it takes more time and its playing strength is correspondingly increased; the average for level 64 is 20-25 seconds per move.
Excerpts taken from the Excalibur Stiletto box.

EXCALIBUR STILETTO Electronic Chess Computer, possibly the first Model that Excalibur Electronics sold in 1993 and most likely predates Excalibur Legend II as being the first Excalibur Model.

EXCALIBUR STILETTO Electronic Chess Computer - MODEL NO. CXG-328E
This picture was taken from the back of the Excalibur Stiletto box, where the same CXG Model Number was used for Stiletto.
Computers that have the same program as the EXCALIBUR STILETTO are:

Technical Specification
Excalibur Stiletto (1993)



Box
Computer Label
User Manual
Spacious Mind
Schachcomputer.Info
Active 2017
Tourn. 2015
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T1
T2
T3
T4
T5
Final
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MANUFACTURER
PROGRAMMER
Excalibur Electronics, Inc
David Levy/Mark Taylor
1500 USCF
1993
$79.95
Not Available
Year:
MFR ELO:
Original Price:
Wiki ELO:
Model #:
328E
My Serial #:
Not Available
Processor OEM
Hitachi
Processor:
HD614042SJ02
Speed:
Type:
4 Bit
0.9 MHz (3.58)
ROM:
4 KB
RAM:
256 Byte
Battery Type:
4 x AAA
Power Adapter:
9V DC 5mA
Display:
16 Board LEDs
Board Type:
Press Sensory
Overall Size:
Board Size:
8x8 in
11.7/8x10.5/8x1
Options Select:
Button Select
Play Levels:
64
Opening Book:
250 Half Moves
Take Back:
8 Half Moves
Position Setup:
Available
Position Verify:
Available
Move Analysis:
Display Info:
Not Available
Not Available
Solve Mate:
Not Known
Save Game:
Available
Ponder:
Not Available
Search Depth:
Not Known
Provide Hint:
Available
Teach Mode:
Not Available
Change Sides:
Available
Active Level:
TM Level:
Not Available
Infinite Level:
Not Available
LV 64
Hardware Specification
Game Features
Matchplay & Test ELO Ratings
Computer Game Rating
Rating Test
Other Computer Chess Ratings
USCF
USCF
Spacious Mind
Human Rating
USCF
CCR
CCNS
Ply
FIDE
USCF
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Class F Level Electronic Table Top Chess Computer!