Batty Optical Projectors. Detailed Sales, Technical Specification & Accessories Catalogue. Batty Optical Projectors Types R12, R20, R30, R30L, R60 and Optotrace. Detailed Sales, Technical Specification & Accessories Catalogue. 24 pages. Manufacturers: Batty Models: R12 R20 R30 R30L R60 Optotrace Contents: Catalog