Vintage yellow ankle length maxi sleeveless nightgown

This vintage nightgown is beautiful. It was purchased along with a vintage robe which is by Claudel and was made in Canada.
This piece has no tag.

no fabric composition tag but feels like the matching robe (65% polyester fortrel, 35% cotton)
yellow with lace trim, buttons down bodice
sleeveless
ankle length
elastic at waist

Size unknown
Approx flat measurements
Shoulder to shoulder 14 inches
Pit to pit 19
Waist 17-19
Length fr top of shoulder 53.5

Excellent vintage condition!

Note colours may appear differently from screen to screen.