| NAME | MATCH NR. |
DESCRIPTION |
| Rijnja Balken en Plafondhangers | 2321 | Log/tech slide rule of cardboard/celluloid, 144x26x2 mm Front Scales: 1 = 2 3 = 4, Back Scales: = 5 6 = |
| Rijnja IJzeren Liggers DIL en NP profielen | 3097 | Steel beams slide rule of cardboard + celluloid, 218x44x3 mm Front Scales: A 1) = 2) 3) = 4) 5) 6) = 7) 8) Back Scales: = 9) = 10) 11) = |
| Rijnja Seehase Patent | 2855 | Generic slide rule of cardboard/celluloid, 145x26x4 mm Front Scales: A = B C = D |
| Rijnja Strackee Beton | 3095 | Concrete slide rule of brass, 219x44x3 mm Front Scales: 1) 2) 3) = 4) = 5) 6) = 7) |