Can anyone date these old 500 Series kits? The box arts look like the current 400 series. A leaflet inside is dated 1974 so they are later than that.
The box's are excellent quality, "four Square" and very solid and have a top and bottom. The die cuts are good and the balsa is pretty light. I picked these up for £10 each (15 bucks) ex shop stock.
All told a quality product whe first made.....