Astra Constable?

Hi guys,

My friend recently bought an Astra Constable in .22 for his young lad and he wants to get him a holster for it...Is the Constable an exact replica of the Walther PPK?

Thanks!

ETA: Link to pics http://commons.wikimedia.org/wiki/Astra_Constable

Not positive without holding them side by side, but it looks to be really close to a Walther I have.