Hyperbolic Match Output
Maker: ALVIN (Japan San-Ai Group)
Model: ALVIN ELITE VECTOR No. 1157
Scales Front: || Sr, SΘ & SΘ, P', P || Q, CF, CI, C || D, DF, LL2, LL3 || Note: LL1' is at end of C; Sr is radians; SΘ is degrees
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, D, CF and DF; π / 4 and M is on A and B; C and C1 are on C and D.
Cursor Front: Has no marks
Cursor Back: Has 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. Has adjustable metal end brackets.
Source: Jodie Hobson