Maker:MICRONTA ( JAPAN San - AI Group)

Model:No. 1157 Electric Vector

Scales Front: || Sr, S° & S°, P', P || Q, CF, CI, C || D, DF, LL2, LL3 || Note: LL1' is at end of C; Sr is in radians; S° is in deg.

Scales Back: || Sh2, Sh1, A || B, K, Th, C || D, Tr1, Tr2, db || Note: db is 20 lg x

Gauge Marks: π is on A, B, C, and D; M is on A and B; C and C1 are on C and D.

Cursor Front:

Cursor Back: Hhas marks; KW at top middle ; HP(*) is at right on vertical line over A & B scales; π/4 is at a vertical line on left over the A & B scales, and √4/π on the right over the C & D scales.

Construction: 25 cm.; Plastic face on laminated wood ; Cursor is not framed; Adjustable metal brackets.

Date:

Source: WKR

Information: Identical to the Alvin Elite. See 1b.