Vintage Sliderules in Cape Town, Western Cape for sale

I'm selling these vintage slide rules from the pre-calculator days of engineering. 1) Faber Castell 52/82 in plastic container, length 325 mm price R150.00 SOLD 2) Castell Reitz 57/87 length 300 mm Price R120.00 3) Glider metal, wood and plastic, very old in a container with missing end. Length 300 mm Price R375.00 4)H&B Aristo Nr. 89 with leather pouch with shirt-pocket clip. Length 155 mm Price R300.00 5) Faber Castell 67/87R. This one has a manual indexing calculator on the back, called the Addiator. Green leather pouch and stylus for operating the calculator. length 160 mm Price: R375.000 All the above slide rules are complete, in excellent condition and working smoothly. I will sell them individually or the lot with a good discount.