The "Dodo-Postcards" watermark is NOT on the actual card – it is an online watermark only.
Animals
A Happy Birthday. W. and K. British Manufacture. RP. 1939
To Wish My Sweetheart A Happy Birthday. British Production Throughout
A Happy Birthday. British Production. Series. No. 52
A Happy Birthday. Dog and Cat. W. B. L. Academy series. RP. 1938
A Happy Birthday. Dog and Cat. RP. Postcard
A Glad and Happy Birthday. Flowers. British Production Throughout
Most Happy Birthday. Boy and Girl. British Manufacture. Series No. 183
Greeting Postcard. To Wish My Sister a Happy Birthday. House and Bridge. Roses. RP