T011f2 SINAR 8x10 Dos de Mesure / Metering back 433.58 + 462.58

Introducing the SINAR 8x10 measuring back, 433.58 + 462.58. How to distinguish it from a standard 8x10 back. Is it worth the cost? For bellows, search for the seller ecbuyonline2008 on eBay and contact them for a quote. They can supply bellows with mounting brackets, in the dimensions you require... (I had them make a bellows allowing 90cm of extension for my P-1/S2).