to the comb 23a along the upper part 20 of frame 12 it can be seen that the envelopes 50 closest to comb 23a drag downward therealong before release for a certain short duration of arcuate movement of spindle 62 when envelope 50 clears comb 23a it then falls down to the lower level and the display includes in view the next photo from each of the top envelope and bottom envelope the amount of time of view for successive pairs of pictures is a function of the rotational output speed of gear motor 68 fig1 and 12 illustrate an improved form of housing 14a that includes a pair of stabilizer segments 110 and 112 the basic shape and formation of housing 14a remain the same or similar with curved back member 36 base 40 and side walls 34l and 34r the bearing races 42 and 42r are also similarly formed with pawl portions 44l and 44r the point of departure comes with inclusion of stabilizer segments 110 and 112 on opposite interior sides of the housing 14a stabilizers 110 and 112 are each affixed to the housing back wall 36 to extend in parallel to a point just inside of the respective bearing race 42l and 42r the segments 110 and 112 extend from the secured back edge.