Comprehensive collection of vintage drafting and calculation tools, perfect for collectors or engineers. This mixed lot includes several slide rules with original cases, featuring prominent brands like Pickett, Keuffel & Esser (K&E), and Lawrence Engineering Service. Notable items include a Pickett Model N3-ES yellow slide rule in a leather case, a K&E Favorite 4056 slide rule in its original black box, and a vintage Lawrence Engineering Service wooden slide rule. The set also features various specialty rulers such as a C-Thru B-85 drafting ruler, a Bruning 2711T Style 5X8 architectural scale, a Ross Island Sand & Gravel Co. concrete block calculator, and a blue Business Forms handling ruler. These instruments showcase mid-century engineering precision and historical office utility. Items show varying degrees of vintage wear consistent with age and use.

Refer to detailed pictures for condition and reach out if you have any questions