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Honestly, I was not expecting to find this one, as European models are really rare here. But I will keep my eyes open.

Absolutely. I hadn't even come across the M16 'Cigaro' until recently. Looks likely that I'll have x3 variants in the near future.Always looking, same as yourself. Those hard to come by pieces are a treat to find

That's a nice original example Are the larger versions around Stateside?

Here are a few of the test helmet stamp marks made by the Crosby Manufacturing Company. The Company had their own Steel Lot stamp marks ie- KCco, NCco,and OCco, these were used to identify the different heats of steel made. Other later marks known to have been used by Crosby were WA, and ZAO, the company was involved in early Experimental and devised their own letter codes to identify the different heats of steel produced. Once M1917 production began to speed up, they asked if they could keep their own system of marking, but were told by the Ordnance Department that they would have to adopt the same system as the other companies. They were allocated the letter A by the Ordnance Department to identify their company on helmets. The ZAO mark is thought to be the last of the experimental lots marks used by this company before ZA1 started. Here are photo's of some of the marks from other sources. I would like to thank the author for this information found on another forum.

Typically what I see here the most are German M1917 egg grenades, Kugels and French F1 types. Sometimes others become available such as British No. 5's. Rod grenades are really rare here, especially British and French versions.

I have over double the amount you have and I love finding the variants of the WW1 models. It just gets a little harder the more you have it seems.

Of the 40 plus WW1 grenades in my collection Austro-Hungarians are the dominant number. Always coming across another type. I find them fascinating and such a collectble 'group' I have 2 more versions of the M16 coming my way (hopefully)

Great information. From what I have been able to find, on the Austro-Hungarian grenades, there are at least 5-10 versions of each type (sometimes more), as they were made by different manufacturers. One could spend quite some time looking for all the variants for that collection.

I did manage to find the smaller version of this grenade. It is a dug example, but these are getting really hard to find.

Update and additional information. Having carried out further research I've established that there are at least 5 versions of the Austrian M16 Schnellwurfgrenate .However, currently I don't know the sequencial order of each particular model from a development, time line perspective. The version posted at the start of this thread is one of the rarer harder to find models which I'll describe as the 'long safety lever model' along with what I suspect is an even rarer version the 'Type 1' pictured above. Similar in appearance & pictured here is an example which I recently acquired & which I'll describe as the 'short safety lever model'. It is complete with all the internal mechanisms. Note the similar but shorter safety lever. Here with the safety lever removed and the outer shell opened up revealing the inner body of the grenade. Here we see the inner body totally disassembled showing its complexity in design. Photo source Alessio Ferronato And here we see how the grenade actually worked. Photo source Internet Here are 4 of the 5 models pictured together and which I'll describe in further detail in a later post. Not aware what the longer piece of ordinance 5th in line at the bottom is at this time. Photo source Alessio Ferronato

In this photo there seems to be even more detail associated with the safety lever. I haven't seen this part of the mechanism on any of the few images to be found on the net. Described as Model 16 Cigaro type 1. Photo source Wikipedia I've just had a nice example of this rare grenade come my way. Outer shell,inner grenade, some of the internals. No safety lever. If I can obtain the dimensions perhaps I can have one made. I'll post pics once its landed.

Wow, I have never seen this one before, very nice!