A study of Mat­tey’s cat­a­logues reveals that the com­pa­ny offered an excep­tion­al­ly wide range of stere­o­scopes. The many dif­fer­ent types often dif­fered only mar­gin­al­ly in details or exter­nal appear­ance. This unusu­al­ly broad assort­ment can part­ly be explained by the var­i­ous acqui­si­tions made by Mat­tey. In …