Oil on cardboard bouquet of flowers by Guy Hillmann or Millman or Allman

We have not been able to identify the signature of this oil on cardboard. The work was made by hand, it is beautifully made, beautifully brought, to be located around 1920. It has a nice natural wood frame. The work is in good general condition, we report traces of wear due to time, dirt, the support is curled. Note shocks and wormholes on the frame. For the condition, thank you for detailing the photos. A5025. Feel free to zoom in. Photos are an integral part of the description. Size: Frame. Height: 44, 6 cm. Width: 36 cm. Thickness: 2.5 cm. Paint. Height: 33.5 cm. Width: 25.1 cm.