Genuine OEM Copier Developer CD102BLK, Part No. 887691.  The product does not have a specific brand name on it, but it was used it for a SAVIN copier.  I have seen this exact package for sale as OEM for RICOH and also GESTETNER copiers.  I found an old New York Times article stating that Ricoh owns Savin, Gestetner and Lanier copiers, and that they are all identical machines made by Ricoh. So it makes sense that different sites state that the same product is OEM for any of these 4 brands (Ricoh, Gestetner, Savin and Lanier).  I cannot guarantee this, but I am just passing along results of my research.
Package states: “Made in Japan for NRG Group, London, England”
The top seal of the foil package is stamped with number 6033710.
NOTE:  Photos show two foil packages as two are available.  But price is for
ONE
foil bag.
Free shipping!
Please contact me with any questions.  Thank you for looking!