In 1968, at my VERY FIRST job as an EE, the 454 was the first sold state scope and replaced the old TEK 500 series.
453, 454 had a black mesh front filter for contrast and a metal filter was available for EMI.
The P31 phosphor is best viewed with a blue filter plastic.
You can get such from TAP plastics as a sheet and cut to size.
The bezels and filter shrouds are perhaps on ebay or try the Vintage Tektronix museum
Jon