Manufacturer: Patco
Country of Manufacture: U.S.A.
Type: Mark IV data log
Date of Manufacture:  
Scales: (Front) K, Sq-odd, Sq-even, A, [ B, T, ST, S, C, ] D, DI, Th, Sh2, Sh1
Scales: (Back) LL0+, LL0-, LL1+, LL1-, DF, [ CF, CIF, L, CI, C, ] D, LL2+, LL2-, LL3+, LL3-
Number of Scales: 29
Gauge Points: π, e, q, s, s', R
Slide Rule made from: Plastic with Metal End Pieces
Cursor made from: Plastic
Cursor Lines: 1 front, 1 back
Overall Length of Rule: 31.5 cms
Length of Scales: 24.8 cms
Width: 5.4 cm
Depth: 0.5 cms
Acquired from: Sphere Research
Date: Mar 2003
Condition: Good
Leather case. Good condition
 Split square root scales like the Versalog and Deci-lon.
 Clearly styled on the sloped side K+E Deci-lon body and case design