I took a gamble based on appearances and was correct: this lint filter is also an exact replacement for the White Westinghouse Dryer model WDE546RBW1 filter which is no longer manufactured or stocked. The price I paid was high but saved me from having to buy a new dryer!
Frigidaire/Tappan dryer lint screen - discontinued by mfg.- 131390300
A much needed, hard to find - discontinued by manufacturer - dryer part. Should like to purchase an extra screen - does anyone have another for sale? - to hold in reserve.